Cleaned Coins – Coin Doctor Cleaning Methods

Cleaned Morgan Dollar
Cleaned Scratched Morgan Dollar

Many ebay coin auctions offer cleaned coins for sale. If a seller is honest and knowledgeable they will disclose this fact in their description. If not, then a buyer must learn to distinguish a cleaned coin from a problem free coin via the pictures and a sellers feedback. Of course, unscrupulous sellers will use lighting, reflections and angles to hide the true condition of their problem coins.

Then there is a small percentage of sellers who don’t know their coins are cleaned, and sell them without this knowledge. So, it’s pertinent for buyers to be as informed as possible when buying coins from any seller, until they find a few they can trust. One rule I adhere to is; If a seller doesn’t respond to emails with questions or better pictures of the coins they’re selling, I don’t bid!

I don’t trust the excuse that their pictures are the best they can take, and if this is true and their pictures leave too much to the imagination, then they have no business selling on ebay. I don’t need their coins that bad with over 125,000 other US Coin auctions to chose from on ebay. If I think the seller is trying to hide or manipulate their photographs then I don’t waste anymore time viewing their auction. It’s just not worth my time or money to take chances.

Cleaned and Dipped Morgan Dollar

Below I will list the different cleaning conditions you will find coins in on ebay. In this, I hope to help buyers to gain a weary eye, and not get ripped of buying cleaned coins.

Dipped: A coin that has been immersed in a substance, or had a substance placed on its surface, to removed some or all of the original or toned surface of the coin, to make the coin look lustrous. (The original surface could be grime from circulation or toning.)

Many substances are used to “dip” coins, jewelry cleaner, bleach, Brasso, etc, and each give the coin a distinct appearance. With a little experience and a lot of caution, a buyer can learn to distinguish the differences between a “natural” coin or one that has been tampered with.

If a coin has a lot of wear and looks white, or the surface is too shiny or clean, then it may have been dipped or chemically altered. Most coins, altered in this method, will have a distinct “flat” luster due to the chemical causing microscopic etchings in the metal surface. Most normal coins will have a glossy or smooth or frosty-lustrous appearance to their surfaces. It takes a little experience to differentiate between dipped and normal coins.

Ebay poses some difficulties in identifying dipped coins, because identifying the true condition of a coin is almost impossible via pictures. Couple that with the poor photographs found on ebay, presents a challenge for any coin collector. It’s recommended that beginning buyers purchase graded and authenticated coins online first, before venturing into the realm of raw coins.

Clean lines on Morgan Dollar

Whizzed (Tooled): A coin that has been polished by using a jeweler’s tool, Dremel, steel wool, or a fine-wire brush. A whizzed coin will either have a mirror finish or fine lines will be evident on its surface. It doesn’t have to be on the entire coin, it could just a be one small spot. Regardless, of how much, a coin with any unnatural lines is considered a damaged and cleaned coin. Sometimes these lines can be masked using photography techniques, lighting or photoshop. But even the most disguised picture will have certain characteristics to look for.

If you think the seller has manipulated their photos or trying to mask a coin’s problems, ask for different pictures. If they offer an excuse like “these are the best I can take”, then don’t ever bid on their coins.

Rubbed: Any coin that has been rubbed with either a finger (thumbing), cloth or other article in an attempt to removed contact marks on the coin’s surface. This type of cleaning is the most difficult to detect, so a 5x loop should be used to detect “rubbing”. Of course, online auction pictures will not allow for this careful examination. So, a buyer should always check the credibility of a seller, and always ask questions, or for better pictures.

Cleaned Coin: I added this to cover any methods that I might have missed so far in this article. A cleaned coin, is any coin that has had any of its original surface (normal circulation grime or tarnish) metal removed, all or in part, to reveal the unnatural lustrous surface underneath.

Cleaned Large Cent: Notice the lighter pink areas in the field and along the edges. It has re-toned a bit.

Cleaned Copper Coins: After a copper coin has been dipped or cleaned the surface will have a pale-orange hue that might look “grainy”. This pale-orange hue should not be mistaken for a the natural orange (often called “Red”) luster of a mint state copper coin. You should always compare an original coin to coins you think have been cleaned.

Lasered: With the advent of laser technology becoming cheaper, many coin doctors will use them on coins to remove unsightly marks. It’s not always easy detecting this type of contact mark “cleaning”, but PCGS is working on eliminating this with their new technology.

Adding Metal: Adding metal to coins surface to fill in imperfections got started with gold coins that had a hole, gold metal was used to “repair” the coin. One should look at their coins with a loupe and pay close attention to how the metal flowed during the strike, this metal flow can’t be duplicated exactly.

I would suggest that a newbie coin collector take a handful of mint state coins with them to a dealer, or coin show, or even compare it too pictures on the computer screen. Don’t be afraid to compare their coins against any suspicious coins. If a dealer get’s agitated when you question their coins, go to another table or coin dealer.

Experience is the rule, rather than the exception, and until a collector has a firm understanding of coin cleaning and what cleaned coins look like, they should use every precaution before buying any coins.

Here’s some cleaned coins in fake grading holders. It’s another issue collectors and potential buyers need to be aware of.

Cleaned, over-graded, fake holder.

Cleaned, over-graded, fake holder.



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