So I recently finished completely restoring my boat which is an 18ft StarCraft holiday used mostly in salt water.
I went ahead and gave it a scotch bright finish on the sides and a fishscale type finish on the bottom with a synthetic brush.
My only complaint about the diapers as an applicator is the lint they left. Even after a couple of salt water runs I can still wipe lint off and I can see it from up close. However they boat doesn't show any signs of oxidization. It's also only been two fishing trips and about a three weeks since I applied the sharkhide.