freshen up tired original paint 68 barracuda...

Yeah the comet thing does work. My 78 wagoneer was a real rot box. Paint was dead flat. Was shot with a paint ball gun many years ago. I repaired the rot. Painted the panels, and scrubbed the entire truck with comet an the finest steel wool I could get. I then compounded,polished, and waxed It. Looked unbelievable compared to when I got it. My duster I did the same but no steel wool. If the paint is thick enough you can work wonders. For the rust, after cleaning it all up, but before wax I would touch up those areas with clear "chassis saver". I think that's the name. It's pretty much same thing as por15 but I know it comes in clear.