Those car repair welds are different. 1: they are not structural; 2: car body work is done in stiches--can't do that in this case. 3: you used to occasionally blow through that 18-20 gauge metal and then blob a cold weld to fill in the resulting hole. NOBODY sells a bike that is MIG welded--they're all TIGed. This most recent roadbike craze gave birth to hundreds,, maybe thousands of youngish frame builders, many of them are very talented. I would eat my hat if there aren't several in the Cleveland area. Find one online or through LBS and go talk to them.