Very hard to remove. The stuff stays sticky forever and it seems to be impervious to most solvents. Go here for my recent experience:
https://www.yenko.net/ubbthreads/ubbt...opics/487291/8
It was great stuff for preventing rust in the areas it was applied to but unfortunately they didn't do the wheel tubs and frame rails in my car so that was the area that got rusty. The floorboards look great though!
The other problem back in the 1970s was the people who applied it. We had a 1980 Honda that had the Rusty Jones rust proofing applied by one of their franchises in Connecticut. Every hole they drilled started massive rust on the body because they never touched up the paint around the edges of the holes they drilled. They just stuck plastic plugs in the holes. In four years the car crumbled to dust starting from those spots. Of course their warranty didn't cover "areas the treatment wasn't applied to". [img]<<GRAEMLIN_URL>>/rolleyes.gif[/img]