I have some scratches to touch up on a black car. I have a Flex 3401 VRG and I'm using Menzerna SF4500 (PO85rd). The speed recommended here on the Geek website is...Polish at 1200-1800 RPM (5000-6000 OPM on a dual action polisher). What speed does that relate to on the Flex? That is what number...
I usually let mine soak uncovered for two weeks at the longest. I haven't had any cleaning issues with the DP product. I throw a variety of chemical residues at it. Just don't put anything greasy in with your lightly soiled cloths. That is quite a deal on the cleaner. I may have to jump in on...
I use the DP microfiber cleaner. I let mine soak in a five gallon bucket of solution until I wash them. This seems to work well until I get a wash load together. I wouldn't let them dry out after soaking.
I've had success on my Corvette with the Meg's 105/205 combination. I'm using the Lake Country Hydrotech pads. Cyan and Tangerine pads seem to work well on the hard clear coat.