Thank you all for your kind words ! When I created thread I wanted to insert a phrase about this , yes two of the coins(quadrigatus and Decius) can be easily cleaned to improve their details , I've been thinking a lot about this , the risk will be to lose the nice black toning of both coins. I don't want to sell them for the moment , so I will not exchange more details for the nice dark black toning . the small lighted altar ?