|SOME ADVISE ON HOW TO RUB OUT THE NEW PAINT TO GET
THE GLOSSY FINAL FINISH.
You will need a 7" grinder or buffer with a variable speed control, McGuiars #4, #2, #7, #9 compound, a bucket of clean water, a stiff foam sanding block, and some sheets of 8 micron (1500 grit) or 10 micron (2000 grit) wet sandpaper.
Do not attempt to polish in direct sunlight. If the paint is non-metallic or clear coated, then wet-sanding is recommended. Do not attempt to sand a metallic paint that has NOT been clear coated as you will disturb the metallic pattern.
Wash the car thoroughly. Use 8 micron (1500 grit) or 10 micron (2000) grit wet sandpaper, and fold three or four sheets into three sections so that none of the abrasive sides are touching (from the back, left side in two thirds, right side in one third) and put it into a bucket of CLEAN water. Have a coffee or cold beverage and do nothing for about twenty minutes. This will allow the sandpaper to become soaked and flexible. If you omit this step, you will likely put deep paper cuts into the paint that won't polish out.
Use a firm foam sanding block, keep the surface wet and sand the surface, squeezing the water off every once in a while with the sanding block to check for imperfections in the surface. Stay away from edges or high crown lines, as the polishing wheel will burn through these areas very quickly.
Once you are satisfied, put a clean wool polishing pad on (if it has old polish on it, then spin the pad and clean it with a dressing tool or something that's clean and not sharp), and apply some #4 McGuiars onto the pad. If you have used 2000 grit to sand the surface with, you might try #2 first. Polish the surface, moving the pad steadily to prevent heat build up (except for lacquer, which can be re-flowed). In a few minutes you will see a good shine develop. Continue with the remaining panels. Put on a foam pad, and use #9 , followed with #7 compound, to bring up a deeper shine and eliminate any swirl marks. Wash off any compound residue when finished and step back and admire a show car shine.