How Do You Clean Coin Money? A Collector’s Conundrum Decoded

Cleaning coins is a controversial topic amongst numismatists, and for good reason. The definitive answer to “How do you clean coin money?” is often “Don’t!”. Aggressive cleaning almost invariably diminishes a coin’s value, often dramatically. However, under specific circumstances, gentle cleaning may be justifiable to remove potentially damaging surface contaminants. The goal is preservation, not making it sparkle like it just came from the mint. If you’re cleaning coins, it should be done to protect your coins from further damage.

Understanding the Risks: Why Cleaning Can Be Detrimental

Before diving into methods, understand why cleaning is generally frowned upon. Original surfaces and patina are highly valued by collectors. Cleaning can remove this natural toning, leaving behind a “cleaned” appearance that is easily detectable. This artificial luster not only looks unnatural but also implies that the coin’s surface has been altered, often leading to a significant decrease in value. Also, abrasive methods can leave microscopic scratches that are visible under magnification and greatly impact the aesthetic appeal. The bottom line? Be careful and conservative if you intend to clean coins.

When Might Cleaning Be Considered?

There are rare situations where cleaning might be considered to protect a coin, but ONLY on non-collectible coins!

• Removal of Active Corrosion: If a coin is actively corroding due to environmental factors, gentle cleaning may prevent further damage. This often pertains to coins stored improperly or exposed to moisture.
• Removal of PVC Residue: PVC residue from improper storage in certain types of coin flips can cause irreversible damage. Gentle removal is crucial.
• Extremely Low Value Coins: Cleaning common, low-value coins from circulation that show damage may be acceptable, especially if the coin is to be used for another purpose such as jewelry making.

Accepted Methods: Gentleness is Key

If, after careful consideration, you decide to proceed, use the least aggressive method possible.

The Distilled Water Soak

This is the safest method and should be the first line of defense.

1. Prepare: Use a clean, non-reactive container (glass or ceramic).
2. Submerge: Place the coin in distilled water.
3. Soak: Allow the coin to soak for several hours, or even overnight.
4. Gentle Rinse: Rinse the coin under a gentle stream of distilled water.
5. Air Dry: Place the coin on a soft, lint-free cloth and allow it to air dry completely. Never rub the coin!

Acetone Soak

Acetone is a solvent that can remove organic contaminants. Use acetone in a well-ventilated area and avoid contact with skin.

1. Prepare: Use a clean, glass container.
2. Submerge: Place the coin in pure acetone (available at most hardware stores).
3. Soak: Soak for a few minutes, or up to an hour for heavily soiled coins.
4. Rinse: Carefully remove the coin and rinse with fresh acetone.
5. Air Dry: Allow the coin to air dry completely on a lint-free cloth.

Using Cotton Swabs (Sparingly!)

Cotton swabs can be used to gently dislodge loose debris after soaking. Never scrub. Roll the swab gently over the surface.

Avoiding These Methods at All Costs

These methods are almost guaranteed to damage your coins:

• Abrasive Cleaners: Metal polishes, baking soda, toothpaste – all are incredibly harmful.
• Vinegar or Lemon Juice: These are acidic and can etch the coin’s surface.
• Wire Brushes: These will cause severe scratches.
• Rubbing: Any vigorous rubbing will damage the surface.

FAQs: Unveiling the Nuances of Coin Cleaning

1. Is it ever okay to clean rare or valuable coins?

Absolutely not. Unless you are a professional conservator working on a museum-quality piece, cleaning rare or valuable coins is almost always a bad idea. Consult a numismatist for guidance on professional conservation.

2. How can I remove PVC residue from a coin?

Acetone is generally effective for removing PVC residue. Follow the steps outlined above for acetone soaking. If the residue is stubborn, repeat the process, gently rolling a cotton swab dipped in acetone over the affected area.

3. What is “coin dip,” and is it safe to use?

Coin dips are chemical solutions designed to remove tarnish. While they can be effective, they are also potent and can easily damage a coin if used incorrectly. Avoid using coin dips, especially on silver coins. If you choose to use one, follow the instructions exactly and rinse the coin thoroughly afterward. Consider professional restoration for serious damage.

4. How do I prevent coins from tarnishing in the first place?

Proper storage is key. Store coins in acid-free holders, albums, or slabs. Control humidity and temperature. Avoid handling coins directly; use cotton gloves.

5. Can I clean coins to improve their grade?

No. Attempting to “clean” a coin to improve its grade will almost always backfire. Grading services are experts at detecting cleaned coins, and a cleaned coin will receive a lower grade.

6. What is the difference between “cleaning” and “conserving” a coin?

Cleaning typically involves removing surface dirt or tarnish, often with potentially damaging methods. Conservation is a more specialized process aimed at stabilizing a coin’s condition and preventing further deterioration, often using gentle and reversible techniques. Conservation should be left to professionals.

7. Should I clean a coin before sending it to a grading service?

No. Grading services prefer to see coins in their original state. Let the professionals assess the coin and determine if any conservation is necessary.

8. What are the best materials for storing coins long-term?

Use archival-quality, acid-free materials, such as Mylar coin flips, inert plastic holders, and acid-free albums. Avoid PVC-containing plastics, which can damage coins over time.

9. How do I handle coins without damaging them?

Always hold coins by the edges to avoid leaving fingerprints on the surface. Wear cotton gloves to prevent transferring oils from your skin to the coin.

10. What do I do if I accidentally damage a coin while cleaning it?

Stop immediately. Further cleaning will only make the damage worse. Consult a numismatist to assess the extent of the damage and determine if any professional conservation is possible. If the coin is not valuable, consider it a lesson learned.

11. How can I tell if a coin has been cleaned?

Cleaned coins often have a “too-bright” or unnatural luster. The surfaces may have a “washed-out” appearance or show signs of microscopic scratches. A coin’s value depends on its surface condition, and many cleanings can ruin a coin’s value.

12. Are there any resources for learning more about coin conservation?

Yes. The American Numismatic Association (ANA) and the Professional Numismatists Guild (PNG) offer resources and courses on coin conservation. Consider seeking advice from experienced numismatists or professional conservators.

In conclusion, while cleaning coins might seem tempting, it’s generally best to avoid it. Prioritize proper storage and handling to preserve the integrity and value of your collection. If you feel cleaning is absolutely necessary, proceed with extreme caution and always use the gentlest method possible.