I've been applying Goof Off with a small paint brush and then almost immediately attacking with a plastic scraper. The blue paper comes right off, the left over adhesive does require another application of Goof Off on a paper towel and yes, the paper towel requires frequent changing, other wise, you do just push the old adhesive around. I tried a scotch brite pad but it clogged quickly and scratched the paint as well.
WD 40 and PB blaster just ran down the hull, all over the soda blasted areas and didn't work nearly as fast as the Goof Off. So far I've done about 10 feet this morning... until the rain started...
The "big rubber eraser" intrigues me. I'm incredibly lazy and anytime I can use a power tool instead of muscle power (especially when it's my own) I'm in. The only problem with power tools is that there's no electricity where I'm working on the boat. That would mean hauling over the generator (which makes a god-awful racket) and possibly irritating the nice people who let me store my boat(s) and RV for next to nothing.
Thanx for all the suggestions but for now I'm going to stick with Goof Off...
Tom G