ae pra quem quer saber sobre lapping olha o q eu encontrei no site Procooling:
Now, I am going to address a massively confused and mis used idea - Shiny does NOT = Lapped. Lapped is creating a perfectly flat surface, it is far different than polishing. When you lap a surface down to 3200 grit it will be very shiny, and will have no artifacts on the surface. Polishing a block on a wheel will make it shiny but will not at all make it flat at all.