I guess that every method of removing old paint has issues. Years ago, my buddy had a 1970 Boss 302 Redi Stripped, where they dunk the entire car shell into a huge vat of liquid chemical, and after it comes out, they wash the body inside and out with high pressure water. When they got the car back, it looked like brand new metal, other than the rusty areas. However, after months of bodtwork and preparation, when they finally painted the car (Calypso Coral orange), a few weeks later, the paint at the lower edge of the trunk lid started lifting. Turned out that some of the chemical had been lurking in the lower edge of the trunk lid, where the inner and outer panels are folded over and crimped, and decided to emerge AFTER the car was painted.
And the guy I sold my black 69 R code Mach 1 to had the car Plasti Blasted, using very small plastic beads at high pressure to strip the paint. He tried his best to remove all the plastic media, but after the car was completed,he said that quite often small piles of plastic debris would collect on his garage floor, on on the carpets, I guess there were hundreds (maybe thousands) of stray plastic beads that collected inside the rocker panels, frame rails, torque boxes, firewall and cowl etc, and over time, the vibrations of the car running and being driven, caused them to "dance" their way to a gap or hole and drop down.
