I agree with this. I am also for the 'scruzz wheel' as I call it, on an electric angle grinder for the bulk of it. I prefer chemical/scrape w/ dressed drywall spatula first, then the scruzz wheel. Rustoleum 'Aircraft stripper' gel used to work really good. But, I think some ding-dong used it in a tiny space without a mask and died. Now they took the 'good' out of it. It's definitely not the same now.
