If you are using wet dry sandpaper you are using the right stuff. It is easy to wreck a razor with a dremel. They have their place, but it isn't sanding blades, I always back my sandpaper with wine corks. When I get to 600 grit I start wet sanding by wetting the surface with WD-40. I have no idea what brands you have available. Any very thin lubricant will do, there must be silicone sprays and the like every where. Once you hit 2000 grit with the paper go to 0000 steel wool with the polish and then just the polish.