I think it is working great.

This isn't a direct back to back but the part on top was in nearly the same condition as the part on the bottom. These are parts of an ashtray out of a '68 Dodge Sweptline pickup. I've got the rest of the ashtray in the solution now and it is working great. It is removing the paint from the ashtray and that is perfectly fine with me because I was planning on doing that anyway.