What do you guys think of oil type rust inhibitors?

Hi again folks. Well it looks like I got taken for a ride when I bought this 64 Valiant. Got it last fall with what was supposed to be 2 year old paint. It sure was pretty except for the old convertible top. Anyway rust is popping out in various places now and I can't afford to have it done properly at this time so I'm going to have it sprayed with Rust Check or Krown Rust Control. They're the only ones near me. I'm going to spray it with something no matter what but I thought I'd see what kind of responses I might get from you guys. Any good results out there? How about bad results? I know it make a heck of a mess but one good thing is, it smells good LOL.
Look forward to hearing back.
Thanks, Wally