Try increasing your wire feed speed a bit to minimize burn thru. You can also try using a copper backer bar, but you still need to regulate the heat and wire feed.
You really should have rounded off the corners of your patches. I thought I had mentioned that earlier in the thread. It warps less than if you have sharp corners. Hope that doesn't come back to bite you in the butt. Maybe it'll mean just a bit more filler.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
