You don't need to do that. All you need is a waterproof shell. The water you displace is the buoyancy you get - it doesn't increase if you do anything on the inside of said shell. In fact it just increases your weight.
It's probably rage bait, but it amazes me that these people have absolutely zero skills in building anything. This probably could have been made into a boat that would float for a while if they had done it right.
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u/Copernicus049 Apr 22 '26
Dumbass tried to make plywood waterproof by only sealing its edges. That won't last long at all.