I finally used my D120, and it's pretty awesome! I normally use sprayaway but have streaking issues at times with humidity. Worked better than I thought it would, so I'll save my sprayaway for dirty exterior windshields.
I find everything but speed 6 is useless. Mark your backing plate to make sure it's rotating. I use my GG3 for headlights, and 6 is where it's at! :xyxthumbs:
If the headlights have marring, than if there was any factory coating (not sure), it's been compromised anyway. I don't believe an AIO will be will be aggressive enough to correct headlight marring, probably need 205 or a light polish, then seal with Opti lens coating.
I have a 2012 f150 and the orange peel is bad, but I'd rather deal with seeing the orange peel than remove CC to fix it. I plan on keeping the truck till it dies, so I need the paint to last. The only way I would even consider it would be if it was strictly a show truck/garage queen. Factory...
I think it's good from the times I've used it, but for the price, Perl is much cheaper and works just as well for my needs. I save my UTTG for trim only.
Others here know the history better than I, but my understanding is autopia.com was purchased by PBMG, so the original forum members started autopia.org. The .org site has some great info, but it's not nearly as busy as the AGO forums.