I think it depends on what kind of finish is on your blade. I've removed scuffs from matte finish blades by simply using soap and water and WD-40. I think WD-40 from my experience is a good all-round blade cleaner depending on the finish of the blade. I have an Entrek knife in which the blade is bead-blasted. On it, I tried everything and the scuffs were still there, except they were less noticeable. On a satin finish blade, I've used WD-40, soap and water, and a stone used for blade erasing and they all seemed effective. The WD-40 worked the best, though I thought.
I hope this helps you. ----Michael