Hi folks,

I am  honing/ polishing a test slab of outdoor marble to determine the best way to proceed with a project.  The attached photos will show the slab piece from beginning to the end.  I am actually working on the backside of the slab because the front is soooooo damaged from erosion that it would be impossible to restore.  I began by cleaning the accumulated grime off and followed with 50 and 100 metal diamond pads followed with 120, 220, 400 resin diamonds. i did half of the slab with 800 resin diamond and 1800 honing powder and the half with polishing compound to show the client the difference as per his request.
Here's my question.  when looking at the finished stone, the last 2 photos, I can see little white dots especially in the veins, but also in the stone itself which I believe to be the natural pores that I did not hone out with my 50 metal.  Should I begin with a 30 metal or spend more time with the 50 metal?  I spent 4 minutes/1 sq foot with the 50 metal.  I know that I need to remove more material.  Are there any special metals good at quickly removing more material?
All suggestions would be appreciated.

Barry



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Thank You,
Barry V Raduta
Diamond Stone & Tile Care
215-816-7689