That's also what I found. The one that worked best for my intermittent (hobby) use is one called Zeronite. I was given some by a machinist at work that didn't like the smell!? But I never could find it again. The bad part was it stripped paint like you say. It actually took off slight surface rust too. The kind that is just brown, not pitted. Now I've went through 2 other brands, but they rot in my sump.
I'd rather take paint stripping coolant with other features being good, and then repaint the beast once in a while. If I could find it again that is.