First you need to establish how deep they are. General rule of thumb is if they are deep enought to catch your finger nail in... then they are too deep to buff out, and just learn to live with them. If you don't have a buffer, then get a clean cotten cloth, usually sold at the store next to the polish. I use a hand polish, different from a wax, and usually can get most scratches out. You want to apply some to teh rag, and continue rubbing till the polish appears to be gone. Concentrate on an area till your satisfied, then move on. Should work out pretty well, Although to be honest, I've given up on polishin the rover. I'll just scratch it again soon anyways.... keep the buffer for the camaro. Also, if you do use a buffer... never use one that goes over 1800 RPM's, or the scratches will be the least of your problems.
Good Luck,
~ Ry