Jody,
VERY impressive!
On my engine bracket, I found a pro scraper to work out better than sanding with all the dust and protective gear (esp indoors). I assume you have Interprotect 2000 epoxy or equivalent as a barrier coat. If not, it might be worth considering. It's solvent based, so ensure excellent ventilation indoors.
I'm not aware of a non solvent based epoxy barrier coat, but that don't mean nuthing. Perhaps it's not an issue where you boat.
Carry on and keep us updated!
Hope it's a lot of Fun!
John