I didn't know palm routers existed, so thanks for that suggestion. One of those looks like it would work great for open flat areas, but there are also a lot of perpendicular bulkheads crossing the seams, especially in the bow area. Need something with reach, maybe die grinder...
benchmarkabrasives.com
My experience with carbide burrs is that the don’t seem to “run“off track unless the user is overly aggressive. Your picture above makes mr think a small router, even with a small tilt base would only do a portion of your work. Using a die grinder, I’d gear up with glasses and a face mask, and orient the boat to the best hand position to gently pull the grinder back from inside the boat to the outside. Taking small passes until you get the feel for it, with 1/8 sheet I don’t think you will be hogging much off unless you have some burn through and Al machines east least with some lube. Burr shape will also dictate how easy it rides in the joints, so buy a set so you can adjust with the interior angles.
