I think you're confusing tallow with flux. Tallow = non stick Flux/tinning flux = solder sticks to the surface its supposed to.
Will give it a shot. Plumber Buddy just picked up some tinning flux and sticks of 50/50 from his other tin knocker buddy. Will try a couple "easy" spots. There's a smashed spot on the top corner of the bed rail and one on the tailgate that aint getting pulled out! Will see how hard it is on there and then if it works well enough try the cab spots. Honestly I think bondo would work fine around the windshield, just something new to try. And alot of it is not visible. I expect to skim coat it with bondo to finish. I don't expect I'll be able to get it perfect w lead, but wil see.
My dad used to solder metal house gutters together, he always used some type of acid to clean the metal with.
I have been using 1” wide fine mesh fiberglass cloth and POR15 with good success. The mesh bridges well and the POR dries very hard. Used the silver POR on the rear window frame of my ‘73 Riviera project.
I have experience as far as doing it, but I'm not a pro by any measure. I've watched and learned from some pros. They're artists!
I would try to zap the pin holes with mig, set some cardboard or something to contain the spatter and a few hits ought to fill them, likely less heat than would be experienced with leading there. My .02.
Lead will fix some holes but don't expect it to have great structural strength. FUMES! DON'T BREATH 'EM!
Duly noted, on both warnings. Structural strength not needed, this is only in the skin. The structural part of the cab is solid fortunately.
@AKguy, thanks for posting that up. My cab frame is pretty solid, not at the stage where I think I need to bridge any large holes. (Well 1 spot is, but I'm going to cut out and replace that with factory sheetmetal.
I had some bondo type stuff that had metal flakes you would add to it when mixing it up, for the life of me I cannot remember what is was called, the stuff worked very good I used it for all kinds of stuff. It wasnt made by bondo and I wanna say i got it a place that sells boat parts down by the scrap yards at Port of Tacoma by fife
Ahhh the 80s, big hair, Trans Am’s & Lead. A good friend did a quarter panel / roof section on an old Camaro back in 84 with lead. Small torch, flat iron, and sticks of lead and a lot of patience. Heated the metal slightly, warmed up the lead stick and smeared it into place. Like coloring with a fat crayon kinda process. He would smear it on then flat iron a little, hit it with the torch a touch and.... back to the beginning. It looked real purdy when he finished. Oh and he’s still around so apparently there’s nothing wrong with eating paint chips and breathing in the lead fumes!! He’s living proof and so are his 14 fingered kids.
I know they use brass as well for pinhole work. I saw them do it on American Hot Rod, Boyd Coddington shop as well as on on at least one other show. I'm sure it's much safer than working with lead.
