Thinking About Pulling The Trigger: Flowing Hair Dollar

For our purposes (understanding I'm not a chemist), xylene is favored because of its' polarity, a solvent benign to metals while having polarity at a contrast to that of acetone - depending on what's to be removed from the coin, one might desire a polar or non-polar solvent.

So, without anything resembling actual knowledge (), I'd think whichever xylene compound had the highest contrast with acetone on the polarity index, if there's a significant difference.

Can you tell I'm stumbling around on a topic I probably shouldn't be?