I've been doing little bits here and there on my projects list and decided to try cleaning 5 Kato SD40 shells that I'd tried to strip previously. The 91% isopropyl did get most of everything off (I must have used 76% previously).
So I decided to do the walks and handrails. Threw them in the alky and left them there a week... hey, it's just isopropyl, right? Pulled them out. The sill and walk/handrails had been left together. They now has a nice warp, being bent up in the center about 1/8" or more.
Softly cursing myself, I proceeded to clean the paint off with no problem. I let them sit (still assembled) for a week. As the walks slowly gave up whatever alcohol they had absorbed, they did straighten out.
Object lesson: engineering plastics (read: walk/handrails i.e.: celcon/nylon/delrin...) have their quirks. I lucked out, but I'll not leave stuff sitting for more than a day.
On another note. I had some Atlas centerflows that I was splicing to make CF5700s. They were the old stuff from the 70s or so. There were Shell (green) and some other white scheme that 91% would barely take off the lettering, I've had bad luck with brake fluid, so that is out. Pinesol and easy-off oven cleaner had no effect. I found a 2oz bottle of Floquil Easy Lift Off. A cotton swab and ELO made a mess but a couple of swabs later, they were clean.
I went to buy some at Hobbytown, found Chameleon and choked at the price: $7 for barely enough to kill yourself (8oz), let alone clean all the stuff I need to strip. Guess I try to find some of Brians NAPA stuff.
Bob in IDaho