Yesterday, we discovered one of the jerry can tie downs on the left was broken, AFTER we had finished welding. So in the break of priming, I went to work. Fabricating the missing piece was easy, aluminum cuts like wood without grain. I used a cut off piece of it to clamp everything together. Then welding was a snap, just a bit of excess as is normal in aluminum. But at least no paint repair in a very visible area.
This was easier as all sides of the weld area were perfectly clean. No North Carolina clay floated to the surface..