The restoration definitively makes it possible to correct and treat imperfections due to the conditions and in the middle where the coins remained.
It would be risky to think that it’s simple and immediate to give back quickly the glare of yesteryears of coins, all depends of their pathologies. A procedure of restoration requires professional instruments, but also a great experiment in the matter.
I recommend to all my customers to show humility and good sense, don’t try to clean your coins by yourself. Entrust them to a professional.