24 gauge i think, i got it cheap from school so thats what im using. i have an old mig that was given to me so its not incredible. the panel is just as strong as any other panel on the car. the gaps you see below were sealed before undercoated. if i turn the heat up, it just seems to burn through the metal. sheet metal is tough to make long welds without warping or burning. im only 18 and new to it all, so thanks for the advice.
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