Everyone to there own and would like to say.....
 
	If you put a chemical on a coin(not a toothpick,flick something off) then why do it.
 
	It is done to enhance a coin from its natural state.
 
	I can only comment on pennies(not hammered etc.) this is IMO cleaning ,else why do it ?.
 
	The Chemical is applied to do a job clean it and the Chemical is left and will not disperse and (of which it was only applied for) will still show.
 
	If you put water on a coin it will dull the tone /lustre but not show over time and can understand ,if you put acetone,acid,any cleaning agent .....Then its CLEANED
 
	If the buyer/seller are both happy then as always it does not matter
 
	This is only my opinion ...... 
	If a coin is ok acetone would not of been put on in the first place ,but will still show.
 
	Never dip a valuable coin in ACETONE.
 
	Pete.