how to use lead to fill in holes on my chevy truck?

Answer 1

1-Grind or sandblast the area perfectly clean.Any zinc coating on the surface from factory treatments must be removed.
2-heat the area with a propane torch or low heat setting .acetylene.While hot,wipe acid flux into the surface thoroughly with a clean rag or paper towel.
3-While applying heat with one hand,rub the lead bar across the surface until some of it melts on to it.
4-With a clean towel,wipe the molten lead evenly across the work area.This is called tinning.
5-Heat the work area and the lead bar at the same time until the lead turns mushy,apply the lead with a wooden paddle coated in motor oil.
6-Work the lead to the best contour using a balance of heat to keep it semi solid.
7-Grind it smooth,treat with acid,wash with water,dry,then apply a bondo finish coat.

You must use 60/40 body solder.50/50 solder used for plumbing does not go to a mushy state and will simply run off.

Answer 2

You don't want to do this. Use Bondo and or fiberglass. They are lighter, stronger, easier to apply and a lot safer to shape.
To do lead you have to heat the area with a torch after cleaning it, paint it with an acid flux, just barely melt the lead by heating the metal, apply the lead and brush and paddle it into place. It takes 3 hands and a bunch of skill and you get the stuff all over the place, dripping molten lead while you learn.

Answer 3

Do not use lead to fill trim holes as its very difficult to play with and you need many wooden tools to smooth in the molten lead.

If you really want to fill in holes go get a mig welder you can even rent them at many home depots. Tack then holes shut then grind smooth, and smooth over with some Bondo.

BTW bondo usually doesn't work to fill in trim holes effectively like a welder.

There's no mix up a sander can't fix up.

Answer 4

This is not as easy as the pros make it look. You have to make sure you're down to a clean bare metal and you have to buy flux in addition to the lead. I would check some classic car sites and see if they can give you good tips on this.