1986 GM used Dispersion Lacquer which is much different then buffing 1988 and up enamels’. Depending if the paint is Checked (little cracks)
you can bring it back. But be careful. The paint is extremely thin to begin with so you do not want to use an aggressive white pad or compound.
Use a yellow wool pad with the 3M white polishing liquid. Keep the buffer at a Low RPM and keep it moving to keep the heat down to a minimal. If
you heat the lacquer up if will get soft and you will burn right through it. Always go in the same direction and when you do the final polish
(Sponge pad with finish glaze) polish “Across” what you just did to remove them swirl marks. Never in the same direction. A smart thing
to do would be to tape up the sharp edges and do them by hand and always cut away from all corners and edges.
Good Luck