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Message:: [QUOTE="TIF, post: 2512386, member: 56859"]I think the coin was previously treated for BD.  The circled areas appear to be relative pits. [ATTACH=full]534584[/ATTACH] This is one of the difficult things about bronze coins.  Apply/creating a new patina is often part of the cleaning/conservation process.  There are many ways to make a new patina and I think some of the recipes or coatings cause or accelerate bronze disease, or perhaps just hide inadequately treated BD.  I generally can't tell by looking at a coin how the patina was made, if it is "original", and if the new patina could be harming the coin or hiding ongoing corrosion. I treat most of my bronze coins upon arrival unless they look impeccable or unless there are different pictures of the coin over time proving stability.  At minimum, they get a light coat of Verdicare.  If they have any loose dirt or sandy stuff (or something that looks like colored wax or makeup), I first soak it in water, then try rubbing alcohol, and then perhaps mineral spirits.  Once anything that has been applied has been removed, if there are any suspicious areas I poke at them to check the stability.  After a thorough soak in distilled water and thorough drying, I apply Verdicare and then store in a sealed safe with a desiccant. I check my coins fairly often, and usually I have a few which need some Verdicare or treatment.[/QUOTE]