I need some guidance/advise concerning the use of graphite for abrasion resistance. From previous posts it appears that the recommended ratio of graphite to epoxy is 1:1. My problem is that the manufacturer of my kit recommends 1part graphite to 10 parts epoxy. The manufacturer indicates that two coats are required. The manufacturer also states that the use of medium hardener produces a harder epoxy than the use of a slow hardener. Has anyone any experience or obsevered any difference in the hardness of epoxy due to the use of different speed hardeners?