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boatbuilder wrote:You'll get nicer welds if you remove the primer at the edges. There won;t be as much spitting etc.
A bit of cellulose thinners on a rag should dissolve it. Its really only intended to be used on overlapped panels where you can't paint in between after welding. Are you going to butt weld or overlap the new panels?
If you're plug welding, you can just remove the bit of primer through the hole you've drilled for the weld. I use a rag dipped in thinners on the end of a flat bladed screwdriver to scrape/dissolve it.
Looks like you have your work cut out there but it looks great so far!