If you're going to use rouge sticks- the ones that are cheap and work great are from a company in Oregon called Sattex, and they have all the grades, and pads as well. www.sattex.com
Call them and ask for Karlene if you want to buy some quantity, or she'll tell you where to get it from locally.
The other cool trick I heard about and want to try is to take a cotton flap type wheel- like you use on a bench grinder, and space it properly on a hand grinder, and then use only the edge. Its supposed to leave no scratches.
I clean off my pads every 3-4 minutes- any more than that and you start making more problems than good.
LOVE THAT BLACK MUD, DON'T YA?