Raceglaze polish works very well and is so easy to use that a power polisher is not needed!!
Is it a polish or is it a wax?
If it’s a polish then I think a mechanical polisher with good technique will always achieve better results than by hand as your arm will fall off if you try to replicate the number of revolutions required to make a difference over a whole car
Waxes can be applied mechanically with a buffing machine rather than a rotary polisher but having tried it, I think waxes are always better hand applied because you can control the thickness easier and buffing off is a breeze and requires constantly turning a cloth which if you are using a pad on a buffer needs to be constantly changed so is a real pain
