I bought an old Thornes 13' aluminum boat. Replaced the transom wood, and the broken seat brackets. Took it out on the lake last weekend ant found 2 small leaks. Not bad for how old thiis thing must be I figure. First one was just a leaky rivet which i fixed with a couple of hammers. The second is a hole in the weld of a previous keel repair. Pics included. I have a few ideas for repairs. JB Weld. Silicone. Drill and self tapping sheet metal screw. Or drill and pop rivet. The balck spot in the middle of the hole is the rubber seal between the original keel and the side sheet. The hole is on the side of the keel so shouldn't be subject to bumping, scraping or flexing. Any thoughts or suggestions?