seam

Hello, I'm in the process of stripping my interior, all sound deadening is gone, now onto the seam sealer. I've been using an electric drill with a wire brush bit in, I'm going to sand and primer the exposed metal but have I got to put some sort of anti rust stuff down first? Or will primer be...

Just thought I'd ask before jumping in and doing it, at the moment the Cupra's wishbones are currently spot welded together in all the places marked with a red dot on this picture; There is around 30mm's gap between each spot weld, now I was thinking where the two plates meet, welding a...