The humble wheat penny, officially known as the Lincoln cent from 1909 to 1958, holds a special place in the hearts of coin collectors and history enthusiasts alike. These copper beauties, bearing the iconic image of Abraham Lincoln on the obverse and the familiar wheat stalks on the reverse, are readily available and often found in circulation, attics, and old coin jars. However, a persistent question plagues many who stumble upon these vintage treasures: should you clean them? The answer, as with many things in numismatics, is not a simple yes or no. It’s a nuanced discussion that involves understanding the potential risks and rewards, and the impact on a coin’s value.
Understanding Coin Patina: The Natural Aging Process
Before diving into cleaning techniques, it’s crucial to understand what “patina” is and why it’s important to coin collectors. Patina refers to the surface layer that forms on a coin over time due to exposure to the environment. It’s a natural process, and for many collectible coins, a desirable patina is a sign of age and authenticity. On copper coins like wheat pennies, patina can manifest in various shades of brown, green, or even reddish hues.
Why Patina Matters to Collectors
For experienced collectors, patina is often seen as a badge of honor. It indicates that a coin has been preserved for a significant period, developing a unique character. Removing this natural layer can be akin to stripping away a coin’s history. Many collectors believe that a coin with its original, undisturbed patina is more valuable and aesthetically pleasing than a cleaned coin, even if the cleaning removes dirt.
The Danger of Over-Cleaning
The primary concern when considering cleaning old wheat pennies is the risk of damage. Aggressive cleaning methods can easily scratch the coin’s surface, remove the original mint luster, and alter the coin’s appearance in a way that is irreversible and detrimental to its value. Collectors often refer to this as “hairlines” or “abrasions,” and they are a significant deterrent for numismatists.
When is Cleaning a Wheat Penny Arguable Necessary?
While the general consensus among serious collectors leans towards avoiding cleaning, there are rare instances where a very gentle cleaning might be considered, particularly for coins that are heavily encrusted or appear to have been subjected to harsh environments.
Removing Surface Grime vs. Altering the Surface
The key distinction lies in the intention and method. If a coin is simply dusty or has a light film of dirt that can be removed with minimal intervention, a very gentle approach might be justifiable. However, if the goal is to make a dull coin shiny or to remove natural toning, then cleaning is generally discouraged.
Specific Scenarios for Gentle Cleaning
- Heavily Tarnished or Coated Coins: In cases where a wheat penny is so coated with grime or verdigris (a green powdery substance resulting from corrosion) that its details are obscured, a very cautious cleaning might be contemplated. The aim here is to reveal the underlying metal without abrading it.
- Preparing for Professional Grading: If you intend to submit a coin for professional grading, some minor surface cleaning might be necessary to ensure the grader can properly assess the coin’s condition. However, it’s often recommended to consult with the grading service beforehand or to refrain from cleaning if unsure.
Safe and Recommended Cleaning Methods (If You Must Clean):
If you decide that a very gentle cleaning is necessary for your wheat penny, it’s crucial to use the least abrasive methods possible. Here are some commonly discussed approaches, with strong caveats.
The Distilled Water Soak: The Gentlest Approach
This is often considered the safest starting point for removing loose dirt and debris.
- Gather your supplies: You’ll need a container, distilled water, and a soft, lint-free cloth. Avoid tap water, as it can contain minerals that may deposit onto the coin.
- Soak the coin: Place the wheat penny in the distilled water and let it soak. The duration can vary from a few hours to overnight, depending on the level of grime.
- Gentle rinsing: After soaking, rinse the coin under a gentle stream of distilled water.
- Air drying or blotting: Allow the coin to air dry completely, or very gently blot it with a soft, lint-free cloth. Do not rub vigorously.
Olive Oil Soak: A Controversial Yet Sometimes Effective Method
Some collectors advocate for an olive oil soak to help loosen stubborn grime. However, this method is more controversial as it can leave an oily residue if not thoroughly removed.
- Submerge the coin: Place the wheat penny in a container filled with pure olive oil.
- Soaking duration: Allow the coin to soak for several days, or even weeks, checking periodically.
- Removal of oil: After the soak, the coin will need to be carefully cleaned to remove all traces of olive oil. This often involves a soak in warm, soapy water (using a mild dish soap) and gentle rinsing with distilled water.
- Drying: As with the distilled water method, allow to air dry or gently blot.
Chemical Cleaners: Generally Discouraged for Value Preservation
The use of commercial coin cleaning solutions, abrasive polishes, or even household cleaners like toothpaste or vinegar is almost universally discouraged by serious coin collectors. These substances are designed to remove tarnish and bring out shine, but they do so by aggressively stripping away metal and microscopic layers of the coin’s surface.
- Abrasive action: Many chemical cleaners contain mild abrasives that will scratch the coin’s surface, leaving it looking dull and damaged to the discerning eye.
- Altering natural toning: They can also remove desirable natural toning, which, as discussed, can reduce a coin’s value.
- Unpredictable results: The results can be unpredictable, and it’s very easy to go too far, permanently damaging the coin.
Assessing Your Wheat Penny: To Clean or Not to Clean?
Before reaching for any cleaning supplies, take a moment to assess your wheat penny. Consider its rarity, its current condition, and your ultimate goal for the coin.
The Rarity Factor
Most wheat pennies are not particularly rare. You can find them in abundance, and their market value is often quite low unless they are in exceptionally high grades or are specific rare mint marks or varieties. For common wheat pennies, the risk of devaluing a coin that already has a low intrinsic value might be less of a concern for some casual collectors. However, even a common coin can be made significantly less attractive and harder to sell if improperly cleaned.
Condition is Key
- Circulated coins: Pennies that have clearly been in circulation will already have some wear and tear. A very gentle cleaning to remove surface dirt might not drastically impact their already modest value.
- Uncirculated coins: If you happen to find a wheat penny that is still in mint state, with its original luster, cleaning it would be a significant mistake. The original luster is a highly sought-after characteristic, and any attempt to clean it will almost certainly diminish or destroy it, thus drastically reducing its value.
Your Personal Goals
Are you looking to sell your wheat pennies? Are you simply enjoying them as historical artifacts? Your purpose will guide your decision.
- For resale: If you plan to sell your wheat pennies, especially to collectors or dealers, it is almost always best to leave them as they are. A cleaned coin is often worth significantly less than an uncleaned coin of the same grade.
- For personal enjoyment: If your goal is simply to have a clean, presentable coin for your personal collection or display, and you understand the risks involved, then a very gentle cleaning might be something you choose to do. However, even then, appreciating the coin with its natural patina can be a rewarding experience in itself.
The Collector’s Verdict: Patience and Preservation
The overwhelming consensus within the numismatic community is that it is generally best not to clean old wheat pennies. The risk of irreversible damage and devaluation far outweighs the potential aesthetic improvement for most coins. Instead of cleaning, collectors often advocate for preservation.
Proper Storage and Handling
The best way to maintain the condition of your wheat pennies is through proper storage and handling.
- Avoid touching the surfaces: Always handle coins by their edges to prevent transferring oils and dirt from your fingers.
- Use protective holders: Store your wheat pennies in protective coin flips, albums, or slabs. These materials are inert and will prevent further environmental damage.
- Store in a stable environment: Keep your coin collection in a place with a stable temperature and humidity, away from direct sunlight and potential contaminants.
Learning to Appreciate Patina
As you delve deeper into coin collecting, you’ll begin to appreciate the beauty and history that patina imparts. It’s a testament to the coin’s journey through time. Embracing the natural aging process of your wheat pennies will not only preserve their potential value but also enhance your appreciation for these historical artifacts.
In conclusion, while the temptation to make a dull coin shine might be strong, for the vast majority of old wheat pennies, the best course of action is to resist the urge to clean. Focus on gentle handling, proper storage, and learning to appreciate the natural beauty that time bestows upon these iconic copper cents. If you have a particularly valuable or rare wheat penny that you believe warrants cleaning, it is highly recommended to consult with a professional numismatist or grading service for expert advice before taking any action. Their expertise can be invaluable in making the right decision for your specific coin.
Why is cleaning old wheat pennies such a controversial topic among collectors?
The controversy surrounding cleaning old wheat pennies stems from the potential for damage and the impact on a coin’s numismatic value. Many collectors and grading services consider cleaned coins to be artificially altered, which can significantly decrease their market price and desirability. The subtle toning or patina on an old coin is often seen as part of its history and character, and removing it through cleaning can be viewed as a form of vandalism.
While some argue that removing dirt or grime can improve a coin’s appearance, the risk of creating microscopic scratches or removing the original surface is very high. This surface damage, often referred to as “cleaning marks,” is readily apparent to experienced collectors and can render a coin virtually worthless to serious numismatists, especially for rarer dates or mint marks.
What are the potential risks associated with cleaning wheat pennies?
The primary risk of cleaning wheat pennies is the irreversible damage that can be done to the coin’s surface. Aggressive cleaning methods, such as scrubbing with abrasives, using harsh chemicals, or even vigorous wiping, can remove or alter the original mint luster and metal. This can result in a dull, scratched, or pitted surface that is unmistakable to the discerning eye and drastically reduces the coin’s numismatic appeal and value.
Even seemingly gentle cleaning can cause harm. The patina that develops over time is a natural oxidation of the copper alloy and is often considered desirable by collectors. Removing this patina, even with mild solutions, can expose a brighter, less desirable copper surface that indicates the coin has been tampered with, ultimately devaluing it.
What are the generally accepted “safe” methods for cleaning wheat pennies, if any?
For minor surface dirt or grime that is obscuring important details, very gentle methods are sometimes considered, though still with caution. Soaking the penny in pure distilled water for an extended period can sometimes loosen surface contaminants without abrading the metal. Alternatively, a mild soak in acetone (nail polish remover without additives) can help remove organic residues like grease or oils that may be dulling the coin’s appearance.
However, it is crucial to emphasize that even these methods carry risks. After soaking, the penny should be allowed to air dry completely on a soft, lint-free cloth; never rub or wipe it. Many experienced collectors will still avoid any form of cleaning altogether, preferring to leave the coin in its original state regardless of minor dirt.
How can collectors differentiate between a legitimately toned coin and a cleaned one?
Legitimate toning typically exhibits a smooth, even coloration that develops gradually over time, often with subtle variations in hue and depth. This toning usually follows the contours of the coin and is integrated with the metal’s surface, appearing natural and organic. The luster underneath the toning is often still visible, giving the coin a pleasant, aged appearance.
Cleaned coins, on the other hand, often display tell-tale signs of artificial alteration. These can include an unnatural, bright, or “dish-metal” appearance where the original patina has been removed, or visible scratches, hairlines, or polishing marks from abrasive cleaning tools. The toning, if any remains, may appear blotchy, uneven, or artificially applied, lacking the natural depth and character of genuine toning.
What is the advice given by professional grading services regarding cleaned wheat pennies?
Professional grading services like PCGS (Professional Coin Grading Service) and NGC (Numismatic Guaranty Company) have very strict policies against cleaned coins. If a coin is submitted for grading and is found to have been cleaned, it will typically be designated as “cleaned” or “altered” and will not receive a numerical grade. This designation significantly impacts the coin’s marketability and value.
These services recognize that cleaning diminishes the numismatic appeal and often implies an attempt to artificially improve the coin’s appearance. For a coin to achieve a high grade and corresponding market value, it must retain its original surfaces and luster, free from any signs of artificial manipulation, including cleaning.
When might cleaning a wheat penny be considered acceptable, if at all, by collectors?
In extremely rare instances, and only with the utmost caution and understanding of the risks, a collector might consider cleaning a wheat penny that is severely corroded or encrusted with a harmful substance that poses a long-term threat to the coin’s integrity. The goal in such situations is purely preservation, not aesthetic enhancement, and the process would be approached with the absolute minimal intervention possible.
However, even in these limited cases, the consensus among serious collectors and numismatists is that it is generally best to leave old coins as they are. The potential for damage and devaluation almost always outweighs any perceived benefit of cleaning, and it is typically recommended to consult with experts or accept the coin’s existing condition.
What are the potential long-term effects of cleaning on the value of wheat pennies?
The long-term effect of cleaning on the value of wheat pennies is almost invariably negative, especially for coins that might otherwise possess significant numismatic appeal due to their date, mint mark, or condition. A cleaned coin, even if it appears superficially improved, will be discounted heavily by collectors and dealers because its surface has been compromised.
This reduction in value can be substantial, potentially turning a valuable coin into one that is only worth its melt value or a fraction of its uncleaned potential. For common dates, the difference might be minimal, but for rare and sought-after wheat pennies, cleaning can result in the loss of hundreds or even thousands of dollars in potential value.