Someone should do a video on this. Subscribing!!!
If you have a dremel or dremel like device try a 520 bit from dremel. It's a small polishing wheel with silica carbide and some lubrication built in. It's a good way to get started and you don't have to mess around with cutting compound as it already has all you need inside the bit.
That being said do not practice on your GG stuff...lol. Grab a stainless steel spoon or knife from your drawer or even an old stainless steel watch and try the bit out. It's pretty hard to mess up but you should get the feel of it on something else first.
Just so you guys know when buffing with Rouge (Tripoli) or white diamond you need to be wearing respiratory protection, that stuff is nasty and will destroy your lungs.