On the front and rear he used MIG welding, while the middle is held together with stick welding. You might think that a boat made exclusively from oil barrels would be heavy, but he said that only two men could carry it.
I just hope he doesn’t fall and cut himself on the sharp barrel edges. Maybe he could file them down, or put a protective plastic covering over the top edge? Perhaps a section of garden hose?
He might want to spray paint the inside too, you never know what rust will do to something like this. But, hey, who am I to make such judgement? This boat rocks.