You can look at some of my pics on my thread. Really you just need to smooth everything out, and get down to clean fresh pink glass. I have run into a lot of starved fibers and some delamination due to water intrusion. I'm grinding all that out. There is a lot of thick roving tabbing on my Chap that is in good shape. I'm just cleaning it some, but leaving most of it in. No reason to grind more than you need to.