Hi TJ,
With the metalizer paints you have 2 choices buffing and non-buffing. I have tried the buffing aluminun on a sabre, but didn't know about polishing the plastic model before hand and also about the gloss black undercoat. As it is my first metal look model, I think id didn't come out too bad. I buffed the paint with a cotton T shirt, but careful here, too much rubbing and you go straight through the paint. I do not have access to Alclad, so I cannot comment on that, unfortunately.
You can very the finish of the different panels by more or less rubbing and by using different shades on the metalizer's range, you have aluminum, magnesium, titanium, stainless steel, etc. to choose from, what I usually do is to spray a sample piece of plastic with the diffent shades and practice buffing in order to get a bit of a view of the finished model. Remember that when you are happy with your finish, there is a metalizer sealer to be sprayed on, or else the paint job will rub off on your hands as you handle the model.
I hope this helps a bit, as I said, it was my first model to be painted in metal look, I must also say that every seam must be really, really well sanded and covered, the aluminum paint show every little detail, so extra work in needed
Regards
Gianni