I had my sfc's welded on only a few months ago, and the spots where they were welded have surface rust on them now. I realize it probably won't even eat into the subframe itself, but it still looks bad.

What do you all do to fix it, just sand it down with a drill and a steel wire attachment, and then prime and paint the welds? I think that's what I'll probably do, although I was also thinking about getting a can of undercoating just for those spots...

 

Paint, Undercoat, POR15 whatever. Anything you mentioned will work.

 

I sprayed some paint over mine. Paint is still there under the dirt.