I met someone in the Alps once who was riding a frame that had completely broken across tghe main tubes and he'd repaired it himself, using carbon patches and bandages. With no attempt to prettify, he then painted it white, and the end result was pretty much the bike frame equivalent of the Soldier In White:
He let me have a ride of it, it was light as a feather, stiff as a board and went like shit off a shovel. He was inordinately proud of it.