i would recommend at least a 3/4 hp motor that spins at around 34-3600 rpm. try to find one with 3/4" spindles, mine has 7/8" and it can limit what wheels you can use due to center hole size. as for the finish it could be due to the motor. after the black were you getting the shine you were looking for or not? if so then it may be wheel speed on the brown and white. i personally dont use brown much on alum. i go straight to white. also make sure you clean the part between steps or you might contaminate your next wheel with the previous compound. i use brake clean or simple green and water, and dry off good before moving on to next.
as for the motor getting hot yes they all get warm/hot after a short bit of use. it should be fairly warm to the touch but not enough to cause you to jerk your hand away.
maybe mpierich also has some input on this? he is also a great source with a good background in buffing. are you out there Mike what do you think.
cliff
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when in doubt polish it out/ why replace it when you can refinish it
G2 Polishing and Powdercoating
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