PVC Residue On Coins

There are plenty of more recent threads - it's a topic that come sup quite frequently around here - but this one will do.

I generally don't rinse any coin unless it's got visible PVC goo and/or it is "sticky" to the touch. But that's just because I'm cheap and acetone isn't cheap, so I restrict its use to coins that I know will need it.

For PVC goo, acetone works fast - soaking longer than 5 minutes is redundant. If it doesn't come off in 5 minutes, it's not PVC goo.

Rinsing with distilled water is also unnecessary. If you've acetone-rinsed properly, there shouldn't be anything on the coin for distilled water to remove, and if you haven't rinsed with acetone properly, then whatever's still on the coin isn't going to come off in water. Water can also be harmful to copper coins if it's not dried off properly - and acetone is an excellent drying agent. Personally, I'd do it the other way around - give the coins a water rinse first to remove anything water-soluble, then acetone.

A distilled water rinse is essential for E-Z-est or other acidic dips, because you need to wash the acid off or it'll eat into your coin. This is not a concern with acetone as it's not acidic.