Engine paint removal

Edsrt said
Just trying to clean up my block to repaint but the original black paint is super tough to take off. I just got the block back from the machine shop witch it was hot tanked so some of the paint is peeling but very thick. So I mask off the machined surfaces and try to wire brush and taking forever to make a dent. So I was wondering what other have done to prep a used block for paint.

Zip strip... It's a chemical stripper that you brush on and let sit for a bit, then it will peel the paint... However, you need to wash the block real good afterwards to get any of it off before priming and painting the block...

Or just prime and paint over the original paint... If it's stuck on that good, your new paint should stick to it and it won't peel later...