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Message:: [QUOTE="dannic113, post: 1370550, member: 35203"]IMO you need to do your research first on any product. Too many of these internet cleaners are really made for silverware, silver tea services, jewelry and the like unless you are getting it from a coin supply store that only deals in coins. The dips for jewelry are usual "heavy dips" that 1)leave residue on the coin sometimes even after rinsing and 2) can etch the coin and will remove a ultra thin layer of the coins surface. "Light" dips and cleaners like GDJMSP suggests along with acetone etc. brings me to another point. I agree with him you need to know what you are doing before doing it. If you mess up then collectors either won't want it or won't pay nearly what it's worth as if you just left it alone. We are all assuming these are just normal collection coins maybe even some finds. If the coins are ultra rare or ultra expensive you could look into NCS (a division of NGC) that professionally cleans and preserves coins then puts them in NGC holders for you. However unless the blue book value or CDN bid is AT LEAST 5 times the NCS fees plus shipping costs it is just not worth it. I've only been to a couple coin shows with local dealers but the general atmosphere is one of selling not buying so some places may give you less than they would if you dropped by their establishment on a regular business day.[/QUOTE]