Chlorinated brake clean will do that. Non-chlorinated (I should have put that in my post) like CRC Brakleen does not do that. As for softening paint or plastics, I always test before using. I've yet to find paint it will remove other than cheap spray paint. Hell, I cleaned an old Stihl 07S with it and it didn't damage the paint at all. The Purple Power stuff is hell on aluminum, so watch out for that. ANY cleaner that will dissolve the gunk on chainsaws should be used with caution until it's proven for your use.