Aha! Once again, YoSteve and I are both doing something the same, unusual way. I use the AIO/SG regimen on LOTS of black cladding/trim. Doesn't attract dust, streak in the rain, or otherwise behave like an ERV dressing.
The black plastic (lightly pebble-grained) cladding on the rocker panel area of my WRX is a perfect example, as is the black plastic trim piece between the hood and the windshield on the MPV. Black/gray plastic grills, sideview mirrors, the list goes on and on. I've even used AIO (very GENTLY) to clean rubber bumper facings. These days I hardly ever use ERV dressings for anything except tires and undercarriage rubber; I use either Klasse or a straight wax.
I use the AIO to clean the trim/cladding first. It hasn't left an undesirable residue (like the "white staining" from Blitz) on anything I've tried it on yet. It DOES clean the material well. Like YoSteve, I put the SG on pretty thick and I let it dry a long time. Brushes can be good for applying/removing both the AIO and the SG (this surface is usually tougher than paint, so scratching is less likely).