Honda didn't clear coat those tanks, or the side covers. Honda didn't begin clear coating painted parts until ,maybe late 70's ,earlier 80's...
I use a heat gun that has variable temp settings. I wouldn't want to go over 200 degrees....maybe a hair dryer doesn't get hot enough....maybe something like goof off, or a citrus solvent remover....
I'd test it underneath the tank first to make sure it doesn't harm that tank .....