Just wondering if anyones done this before, since it's worked well for me so far. When sanding with lower grit, coarser sand paper I find putting some rubbing compound(i use turtle wax brand because it's the cheapest) on the the blade first helps the sand paper cut faster, and actually makes the scratches more uniform so the next grit gets them out faster. It only works up to about 600grit, and then it just clogs up the paper and has the opposite effect. I guess it's similar to wet sanding, or using a slurry while honing. It does work though. Anybody done this? What do you use for it?