Yeah, I'm not sure if compressed air would have any effect on the coin, it might be better to leave it. With tarnish, it would be necessary to clean it to remove it. This would ruin the coin though, and remove any remaining lustre and features etc...
From my research, it seems that tarnished coins (referred to as toning) are not negatively looked upon. However, this might be different for spot tarnishing, which is much less appealing than an even tarnish over the whole coin. Any ideas from anyone else? Grading, value etc?
From my research, it seems that tarnished coins (referred to as toning) are not negatively looked upon. However, this might be different for spot tarnishing, which is much less appealing than an even tarnish over the whole coin. Any ideas from anyone else? Grading, value etc?





















