So.. I just got to ask.. If a person is using eching primer and is planning on using filler right on top of that eching primer.. What filler should one use? Everyone has told me to put it over bare metal as well but as I do a little at a time it would make sense to me to just lay it on the primer... Or should I spray some other type of primer there and apply the filler? I am really hung up on putting the filler on the primer. It seems I see a lot of rust under old filler and thinking that some form of sealer would help. Sorry to ask, I read the posts I am just more confused.
