I had a red 86 Mustang GT that looked orange form the oxidation. I got the Meguiars 3 step system and it went back to red. In fact, it looked good enough to win best of show for 79-86 (Four eyed Foxes) Mustangs here in a Mustang show. I got mine at Autozone. Here's their description of the system:
Step 1 - Deep Crystal Paint Cleaner. Regular washing cannot remove all of the contaminants that can dull your paint finish. Meguiar's non-abrasive Deep Crystal Paint Cleaner safely removes road grime, surface contamination, light oxidation, swirls and light scratches to restore damaged and dull finishes. Prepares all paint finishes (including clear coat) for polishing and waxing.
Step 2:- Deep Crystal Polish is a pure polish not a wax and doesn't cut. Clear coat safe, the formula creates a brilliant high gloss finish by conditioning and nourishing paint through the replenishment of valuable oils. This makes dark colours darker and reflections deeper. It's that extra step necessary to create an amazing wet-look show car shine.
Step 3:- Deep Crystal Carnauba Wax creates a strong, protective barrier on your paint that locks in shine and gloss. Meguiar's long lasting, tried and true formulation utilizes the highest grade of carnauba to protect all paint surfaces, including clear coats.