I have sanded all the paint off my truck cab and I am in question about what to do next. Can I apply body filler of etching primer? I would like to shoot some etching primer to keep it from rusting. And then add the filler and then shoot slick sand primer over that. Another question I have is about the guide coat. Do you spray it on in between coats of primer which you are going to sand so the high spots show up? What is the best method of doing this? If I am wrong in any part of this let me know, I am open for about anything. Thanks a lot!!