I've stripped multiple Atlas loco shells using just 91% isopropyl alcohol. Available at most any drug store or walmart pharmacy. Relatively inexpensive too. I let shells sit for a day or two. It doesn't take long. Rinse and use a toothbrush or similar to get into the nooks and crannies. It's my preferred method as it's relatively benign with respect to odor and cleanup.
It did not work on the diecast frame though. I don't know if it's different paint, or simply better adhesion. Even after soaking for an extended amount of time, the paint wouldn't come off. I used the spray on Citrustrip, bought at Home Depot, to strip the frame. Again, I was looking for a safer alternative since I was doing this work in my apartment. If I had a shop, I probably would have tried something more aggressive.
You cannot use the 70% type alcohol. Only the 91% type. The paint lifted right off in most areas. The corners were more stubborn.
Jim
