Quote:
It will not directly affect the metal or the patina of a coin and it will only remove surface contaminants

with Biokemist6.
Most coins needs the surface contaminants or dirts to be removed before putting it on an album. Because these dirts might even damaged the coin if allowed to stay for a long period. just soak it for a few minutes...allow it to airdry...no wiping... and that's it. Toning is still there