Has anyone used any ceramic coatings or dry film lubes ?? I was looking at some s2 stuff that had ceramic on the pistons and didnt show any heat discoloration on the bottom side. That looked good, but he also used it on the bearings which sounds like a good idea but they way this was comeing off, i question the usefullness. He didnt dryfilm the skirts, but ive never heard anything negative about it.