Originally Posted by
Utopian
That region that was loaded up was not cutting, so you were just wasting time and effort lapping with the plate in that condition. I suspect that the reason that this build up happened in the first place is because you were not getting enough water between the plate and the hone. Make sure you have a sufficient stream of running water and make sure to hold the plate in such a way as to direct the water between the plate and the hone. If you ever see the beginning of this sort of build up again, immediately stop and clean the plate, like you already did, before resuming lapping.