I marked all the leaking rivets and replaced with stainless #10 machine screws sealed with 3M 5200. The rivets were 5/32 and the new #10 screws are 3/16 allowing me to true up any elongated holes. Both the inside and outside rivets are sealed with Gluvit. I didn't coat the entire hull, just the rivets and any areas with corrosion damage on the inside. I want the water to drain under the ribs and sealing the entire inside would prevent that.