There's a company in nisku I think it's called enviro strip, they cans strip paint off stuff that's easily damaged. I talked to him to see if he can do my jet boat with out hurting the aluminum and he said he can. But work is slow so I never took the boat in for a quote so I can't say how much.
We stripped 3 paint jobs off the race hull for the 15 worlds using chemical stripper. Elbow grease is cheap! If you call Bratt jet or Eagle I'm sure they could put you in touch with a media blaster as well.