[ATM] grit size on tile tool

[Norm Prince]

I say break that tool in with the 80 grit, but thats just me...i'm a novice.

One thought tho...if you need to add another layer of tiles, that would be a 
lot like starting over with a new tool...i mean the new tiles would be more 
or less flat.  So it wouldn't be much different than making a whole new tool 
at that point (and considering the value of human error in gluing on new 
tiles probably less desirable than a new tool cast to the slightly different 
mirror).  Most of the wear on the tile will probably occur just getting it 
and the mirror shaped up good to each other.  What i mean by that is, you 
will be eating up less and less tile as you go down thru the grits so once 
you break the tool in...well thats the lions share of tile disappearing.

patience is a virtue...i say keep at it, and don't be shy about going back a 
grit anytime you think things are out of wack (its quicker than going back 2 
grits later, or grinding a defect out with a "small" grit)...16" of mirrror 
is a lot of surface area to deal with, and it will go faster once you marry 
that tool and mirror up into good contact.

Are you doing this all by hand?

Best of luck Horrace,

-norm-
Georgia, USA (land of increasingly bad, and now colder seeing)

----- Original Message ----- 
From: "horace r davis" <hrd9 at juno.com>
To: <atm at atmlist.net>
Sent: Tuesday, February 06, 2007 10:46 AM
Subject: [ATM] grit size on tile tool


> 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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