Powered polisher?!

Tbh thats not going to get you a good quality one. If you can up it to a ton, Dodo Juice are doing a decent one

http://www.dodojuice.net/preparation/spin-doctor-rotary-machine-polisher/

Wish i did mate, as i'm planning the same thing soon lol. Get signed up to detailing world, soon get some answers on there

Personally I wouldn't use a rotary if you're a beginner, start with a DAS-6 ...something like this is a good starter kit: http://www.cleanyourcar.co.uk/polis...ion-polisher-menzerna-intro-kit/prod_721.html ...you can get a bigger kit for more money but you'll probably find that you'll want to try different pads and polishes and build up your own collection of what suits you. If you can stretch to it, invest in the DAS-6 pro http://www.cleanyourcar.co.uk/polis...ion-polisher-menzerna-intro-kit/prod_720.html ...it's a better motor and a longer cable etc. I've just noticed in the first one I linked, it has the wrong details, it actually only has a 500w motor and a 3 metre cable, their listing is wrong
Have a read through this http://www.detailingworld.co.uk/forum/showthread.php?t=63859 it should tell you most of what you need to know.