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I finished it off last night with some worn 400 grit 3M paper and called it good. It feels pretty smooth now. Anxious to try it.

Thanks Lemur

I just checked it dry before I left for work and I think its about done. A little light lapping with just the weight of the stone should be fine.

I will try some 600 or 800 as I don't have anything higher.
I don't believe any of the grit is coming off into the stone, no. This sandpaper holds together really well.

No Hirlau, not two hours to remove the pencil lines, as I have removed them two or three times.
The surface just still feels too grainy. The 1,000 Norton that I lapped first is smoother than this.

Actually it doesn't say if it is a wet/dry paper but the water does not affect it and it lasts a long time I think. I have the paper on a marble tile in the big garage sink and the surface is wet the...

Hirlau, I am using 3M "Sandblaster" paper 180, 220, 320 and some Norton 320.
I have probably lapped on it for 2 hours and it still feels slightly grainy and porous.
Not quite as smooth as the...

Did the 8,000 side but the 4,000 is a PITA!
I am sick of lapping it on sandpaper already. Almost wished I wouldn't have bought it to be honest. :(

I just received my Norton 220/1000 and 4000/8000 the other day and wanted to ask a few questions.

First: I couldn't find any glass at Home Depot to put my sandpaper on so I bought a 12" x 12"...