Is there anyone who has a good idea for how to approach this.
I've come up with brush cup, wire wheels, paint remover, and scrapers.
Oh, I forgot. Persistence.
It's a light weight aluminum welded and riveted boat that's going to be used in lakes for crayfish and an occasional crabbing trip. Plan is to coat the bottom inside and outside to waterline with a lineX style spray.
A prior owner used some resins to seal the loose rivets and I'm finding that some of that can stay put as long as I can clean up the rivet areas. I'm finding there has been some compromise on those areas. Oxidation.
Fortunately the inside bottom was never painted. Just most of the rail..
I tried using a cheap brush cup and after 7 square feet is cleaned its starting to warble as the wires are falling out lopsiding the cup.