Quote:
Originally Posted by Doug_B_928
As the subject says, I'm wondering how much space around the weld area should have weld thru primer? For example, when preparing the back side of a part that will be but welded in, but not accessible for priming after welding, I've been putting down epoxy but taping off the but weld edge with 1 inch tape. Then putting weld thru where the 1 inch tape was, then welding. Is this the correct procedure? Or should I just be putting epoxy on the whole piece and what burns away, burns away?
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It's hard to answer it scientifically as I don't fully understand it but what I can tell you is so far a handful of OEMS have started to recommend to do exactly that. Epoxy prime everything and what burns burns. Come back after all other refinishing and apply cavity wax to any areas that you can get inside of. Any flanges or overlapping metal we "finger" seam sealer into the edge of the flange after primer in case there are any hairline or larger gaps. You will not see this seam sealer as it is only wiped into the crevices and excess is removed.