How to reveal original paint?

[Llay R. Rac]

I had a corvair, it had been overpainted. I was at the quarter car wash trying to remove a big blob of dried bird poop. Suddenly the overpaint started bubbling/blistering off from close contact with the pressure washer wand. I removed half the overpaint that day. The rest i removed with some plastic razor blades, the few stubborn spots i put industrial strength packing tape on, and the paint came off when i pulled the tape off. I had a nice
original paint job underneath, except for two spots that had been primered.