I only use lower grade coins for rings....I need one bronze to complete the 12 Caesars... completed the Silver and need 4 Golds to complete the Gold
Very much so! But only to other coins with bronze in them. Got a coin I recently treated for it which before, I had isolated from my other coins, and I still have isolated until I feel fairly confident the BD won't return.
Soak in distilled water changing it daily for a week sometimes longer. Pick or brush what will come off before soak & at changes. If after that theres a small amount of BD still, use verdicare. I use an rx cap put a drop or 2 in the lid set coin in & put another drop or 2 on top DO NOT PUT A LID OR COVER OVER COIN. In drastic cases take some baking soda & ash with water, I used distilled make a paste & let coin set in it for a day or so change as needed, use to much can damage patina. I've cured 4 working on 5th coin I've bought with BD. KEEP SEPERATE FROM COLLECTION FOR ATLEAST A YEAR, with no further BD present.