On Monday, November 2, 2015 at 2:19:11 PM UTC-6, Nil wrote:
Parallel to the "How to get expanding foam off my hands" thread, how
about tile? I used some Great Stuff a few years ago to fill the void
between the bottom of a baseboard and the tile in a bathroom. Some of
it got on the tile, and even though I wiped it off, it left a yellow
stain. It's well-cured now, of course. Is there any magic chemical
solvent that might get that off? It could be something you wouldn't
want to get on your skin, if need be.

Wouldn't a wire brush or wire wheel in an electric drill run at low speed also work???