[ATM] grit size on tile tool

[Jarvis Krumbein]

Horace, go back to 80 grit and stay with it until you have good contact
over the entire tool surface.  The fact that there is no wear on the
center and the edge tiles indicates that you have a way to go for this. 
Stay with the 80 until you have wear on all the tiles and the sharpie
test indicates a spherical surface.

Jarvis Krumbein
 
On Tue, 6 Feb 2007 10:46:13 -0500 horace r davis <hrd9 at juno.com> writes:
> On my 16 in mirror I was using #120 grit for 2 1/2 hr but I am not 
> making
> contact with all the tiles I have a lot of # 80 grit left so 
> thinking of
> switching back to wear in the tool and fix the unevenness in the 
> mirror.
> I have extra tiles so I could always add another layer if they wear 
> too
> thin. It looks like I had a small ridge in about 3 inch from the 
> edge
> which caused  these tiles too be high and not making contact the
> polyurethane in this area. The polyurethane has not come off some of 
> the
> tiles in this area. In other areas the glazing is off on the edge 
> tiles
> as well as the center tiles.
> the tool is not wear in the center or the outer edge.
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