Today I tackled the trunk area. This car was Ziebart rustproofed back when it was new and that stuff is nearly impossible to remove. Solvents just smear it. It's almost like roofing tar and it's about 1/8" thick. A different, and thicker, but equally adhesive version was over-applied later, on the GM replacement quarters and tail panel that were replaced in the 1980s. The hot water seemed to work but VERY slowly. Like around 5 seconds of close up blasting to remove one square inch. It was mind-numbing and carpel tunnel initiating to say the least.
Here's the before shots:
