I would think you need a LC 6.5 orange power pad (to remove swirls with the more agressive polish, and a white polishing pad for second least aggressive polish.) and always start with the least aggressive product and move up. If you are applying the wax via hand you will need a yellow foam applicator or MF applicator. I would apply the wax in a front to back motion (window to grill)on horizontal's and on the sides from side to side (the way the wind flows over the car.) Since your paint is Silver you might want to use a glaze like Adams Brillance before the wax, that should make the flake really pop. Use a 70/30 blend (polyester to polyamide) Micro Fiber towels to remove any wax or polish. If you have some MF's check to see of they scratch by rubbing them on the back of a blank CD, this will let you know how hard to push or not to.
Let's see, I would buy some QD (spray detailer) for remover of stubborn dried polish and maintance between P21s layers. Also when you wash remember the two bucket method, one for soap and one for rinse. You will need a clay bar to remove any imbedded contaminents that are on your paint, and for this you will use the QD as a lube. This will prep the paint for any polish- if you wax on top of gritty paint, then you have waxed gritty paint, if you clay and polish, you will love IT! Any more questions chime in, there are alot of us who can help with the PC use.
Andrew