Well, Jon, before they wore after one ride, they were pretty knackered, so it seamed only fit to get them revitalised.. however, mix 5tens and Peak grit and they wore after the first ride, still, the rest of the cranks, the home made bash all look much better than before.
Talked to RD @ Ceramikoat today, there sending FOC a new pair of crank arms in a different coating, the one I had asked for was a first for them, and that maybe the reason for the quick failure.