JohnM writes:

That sounds like some useful stuff.

To the OP: if you're going to try some solvent on the rollers, the
easiest way to get it on them will be to put some on a piece of paper
and send it through. If you want to try sanding them, send a piece of
pretty fine sandpaper in and hold it so the rollers spin on it a little,
then pull it back out. I'd not use anything coarser than about a 120
grit, maybe a little finer than that.

Thanks for all the suggestions! Hopefully a solution (no pun intended) will
come out of this discussion.