well I put the boat in the water for the first time since I got it. We instantly noticed that water was leaking in under the engine. Found that it's leaking at the seam in the rear where the aluminum trim is. I drilled the rivits out and removed the trim and sure enough, that's where it's leaking. There were loose rivets and some are missing. What is the best way to seal this up? I have heard to use silicone and had another guy say to just fiberglass the seam closed and just drill new holes for the rivets. What do you guys think I should do?