What's the best way of protecting metal that will never be seen again? I'm thinking of when I finish off repairs on the A-pillar. Water shouldn't be able to get in, but I'm sure that it will (it obviously did judging by the mess that I found).
Ordinarily I would have painted it with underseal or hammerite but I don't think that this will do the weld much good.
Ordinarily I would have painted it with underseal or hammerite but I don't think that this will do the weld much good.