dfoxengr- Interesting about the FF separating for you, mine doesn't do that to an extent that matters and it takes me quite a while to go through the multi-gallon lots I buy. Doesn't yours work OK after you shake it up?
I *do* really like FF on black trim, simply great stuff that gives the look I'm after for most such applications (doesn't leave a glossy enough finish on paint for me).
Anyhow...on trim you might try a W-O-W-A sealant after you do the drying; I'm experimenting with Garry Dean's Beyond Infinity Sealant with generally good results, though it leaves a much glossier finish on certain plastics than FF does.
But yeah, that does mean using one thing as a drying aid on most of the vehicle and then going back with something else on certain areas. When I don't want to bother with that I just use FK425 or FK146 or Griot's SpeedShine on everything, but those don't leave as much stuff behind as the FF does or do I like their look/effect on trim quite as much. They work *OK* on trim, just not as well as the FF.
The QuikShine worked fine on both trim and paint, so maybe Scottwax had the best idea, it just didn't wow me.
And yeah, certain QDs can mess with Collinite. I once had FK425 utterly ruin 476S to the point where I had to completely strip it and reLSP the car.