Originally Posted by
Kaden101
10 minutes!! It took me an hours to get both sides of my Norton lapped satisfactorily using wet/dry sandpaper, purely because the 2 opposing corners on both grits were lower than the rest.
I have a question, what causes the black build up on the 8K side if you haven't finished with the 4K. I'd have thought the 8K would just take metal off more slowly so I was wondering where the black comes from? Having never had to use the 4K side yet (touchups only) I was just curious as it's not something I've experienced to date.