Support BladeForums! Paid memberships don't see ads! I wouldn't say it's quite on the same level, but I've had some light corrosion and staining on my s30v Spyderco Chaparral since I reground it. Supposed it was due to the relatively coarse, worn 120grit belt satin finish. I ran coolant, so I don't think there was any heat build up from the belts to blow the HT.