I had a go with my new DAS-6 at the weekend (first time I have ever tried machine polishing), I used Megs Ultimate Compound (because I already had it) with firstly a black Chemical Guys Hex-Logic pad and then an orange one. Neither seemed to make the slightest of difference to the paintwork, plus it killed my back bending over the bonnet.
I only did a third of the bonnet before I gave up, partly due to my back and partly due to the fact that it wasn't actually working. I ended up doing it all by hand and although I didn't achieve the correction I wanted, the car looks great!
I might give it another go with some of the equipment mentioned above, or I may sell it, I havn't quite decided yet.