I put blue duct tape on the vulnerable body areas (such as wheelwell openings) of my '96 Viper GTS to protect the paint from rock chips in all the track events I was running. This included putting tape on the rocker panels, which cover the exhaust.
MISTAKE.
When I tried to remove the tape after an entire season (3000 miles) of track events, it was a bitch, and NOTHING seemed to work on the baked-on areas of the rocker panels. I tried WD-40, kerosene, gasoline, bug & tar remover, parts washer solvent, and carburetor cleaner. All of them might as well have been tap water.
Then someone told me to use Goof-Off, a product designed to remove paint overspray.
That worked, and ever since I have kept a gallon of it in my shop for such eventualities.
JR