Wondrous brush for cleaning your coins

Don't clean your coins unless you use a very special brush. Ran across this ad in the Numismatic Gallery Monthly. Wonder if the Swiss still make the magic brush.

Cal

 

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I wonder if the modern version sold by Aliexpress is similar $9.90

 

Nic-a-brush! Even safer!
Amazon $9.95

 

Brushing copper coins was very common in the 50's and 60's and still may be. It was not wire brushing but using a very fine brush similar to a paint brush, not really sure what it does to help but doesn't damage the coin.

 

There is only one thing to use
https://www.dremel.com/en_US/products/-/show-product/tools/4000-high-performance-rotary-tool

 

This is what is used on half of the "is this an error?" coins on CoinTalk

 

In EAC they also commonly still us the #4 jewelers brush which is made using fine goats hair.