Sorry. Just mentioned it. Didn't mean anything bad by it. If I didn't mention it someone else probably would have.
Here's a link to Mike talking about his method:
http://marbleconnection.com/topic/19143-open-core-latticno-would-you-polish-it/?p=165686
I kinda sorta remember him talking about filling in things with significant damage, but I can't swear to it.