My buffer that I have is an older dewalt that is 1750 rpm. single speed, Will it work with the new cutting compounds? I know that all the new ones are variable speed, but will mine work? Thanks

Yes it will work. Be sure to sand with at least 2000 and you shouldn't have a problem.
Run a search on buffing and you'll come up with some good information on speeds and techniques used. Here's one that covers a few different methods: http://autobody101.com/forums/viewtopic ... n&start=30

Thats a nice thread I remember it..

For wool pads, you will get the best results with faster speeds.. 2200-2600 depending on how comfortable you are..

For Foam pads you can use very slow speeds in comparison.. I burnish at 1000 since its as slow as my buffer will go and for the rest of my foam work I run it around 1400-1600

Just a week or so ago, I cleaned some pads and spin the excess water off with my buffer as usual.. I always crank it up to 3000 ( max ) to do this.. Well I was busy and in a hurry as always and ended finishing up one whole side of a car with it still set on 3000 rpm...

Speed is not the enemy with buffing in my opinion.. Its lack of time behind the wheel that gets you into trouble,, Sucks but just the way it is in my opinion

Best of luck to you buffing.. I think its as hard as much of the other stuff we do until you get it down,.,. Buffing can make you want to quit.. But dont do it.. The finish you desire is obtainable with practice and patience