Glad to hear you got yourself a new PC. I think you'll be EXTREMELY happy with the results you achieve once you master the short learning curve.
Here's my 2 cents worth of advice:
First, most importantly, keep the PC on the paint when you start and stop it and do not pick it up off of the paint when it is running. The pad sailing across your garage at warp speed with tell you that you forgot point number 1!
Second, when working the PC, overlap your passes by about 50%. Go back and forth first and then up and down. (Or vice versa if west of the Rockies) Move the PC at about 1 inch per second.
For polishing the paint with the SFX2, yes...make your first one or two applications with an X on the pad and work a small (2'x2') area at a time. Work the polish until it is almost dry then wipe it off right away with a MF towel and inspect your work. If all of the mark/swirls/oxidation are gone and you are satisfied, go to the next area.
For polishing, if the paints in decent condition, I usually go between 3.5 and 4 on my speed dial on the PC. Again, if you are getting good results, stick with what is working for you. After about 2-3 sections, the pad should be properly loaded and only require 3 or so dabs per section.
So far as waxing goes, I usually do paste by hand. With #16, be sure you apply a very thin coat, let it haze and then remove. Remember, 2-3 thin coats are far superior to 1 thick coat. (Not too mention easier to remove)
If you choose to apply the #16 with the PC you can either use a butter knife to spread a dollop on your pad, or you can pop the whole glob out of the tin and rub it on the pad. If you use the PC, again go at about 3.5 to 4 on the dial for application.
To remove the wax, a trick that I found that works for me is take the firmest polishing pad and put it on your PC. Then put a MF bonnet on over this firm pad and use that to buff out the wax or polish. This seems to cause the the wax to "POP" a bit more IMHO.
Hopefully this is of some help to you. There are a lot of helpful and knowledgeable people out here so don't hesistate to hit one of us up if you get in a jam and need a question answered.
Lastlly...good luck and have fun.
