I used to help my Uncle restore L2 Taylorcrafts.  I got stuck repairing the aluminum engine cowls and tubing.  These were WWII era planes and by the time I got to the cowls, they looked like swiss cheese from all of the riveted patches and cracks.  I could TIG weld them and dolly them out to look like new.  Also welded up engine cowling and turboprop combustors for the local FBO.  Thought there might be a business opportunities there, but the price to be a certified repair station was prohibitive. ... View more