I ground off the corner of an aluminum cube project to demonstrate a technique for filling a hole. A gas lens cup helped for this task
Outside Corner joints on 11ga 6061 aluminum are enjoyable. This This Aluminum cube project is a good way to get some practice on outside corner joints.
Tanks, Reservoirs, Pontoons, can usually be repaired using a doubler patch that uses a lap joint
Dimensional restoration is a big part of aerospace maintenance.
A whole lot of aerospace tig welding is restoring worn metal.
And that often involves being able to weld a very small bead on an edge.
The thinner the metal, the more difficult it is so its good to start thick and work your way dow...