I very much appreciate all the feedback I got for debugging my hand
I made some experimental sanding sticks using wood, double-sided foam
tape, and wet-or-dry sandpaper, and the effect of those on my cabs
seems to be the equivalent of twice as fine as diamond laps of the
same documented grit. Eg: 600 grit wet-or-dry sandpaper stick seems
to polish equivalent to my 1200 diamond wheel but without the
additional problem of adding new facets.
So I did the following based on pooling everyone’s advice together.
Currently I have diamond plated 8 inch laps from Inland of the
following grits: 175, 325, 600, 1200, and 3000. The 185 and 325 laps
have been used but not very extensively, these have lots of bite
left. I used my 600 but not as often. I hardly use the 1200 and 3000
What I did today was machine half a dozen 8 inch laps out of Lexan
(acrylic plexiglass, rated 20 times the strength of glass).
I created a felt lap and 2 leather laps, using double sided Gorilla
carpet tape as my bonding agent.
I also created 400, 600, and 800 wet-or-dry sandpaper laps, using
double-sided foam tape as my bonding agent.
What I propose for my sequence for agate and jasper is as follows:
175 diamond: preform, rough bevel
325 diamond: fine bevel, rough rounding
600 diamond: rough sanding
400 foam backed wet-or-dry: fine sanding
600 foam backed wet-or-dry: initial prepolish
800 foam backed wet-or-dry: final pre-polish
leather, charged with 15,000 grit diamond paste: initial polish
leather, charged with 50,000 grit diamond paste: final polish
Would this be a satisfactory sequence, or would you add, delete, or
change anything based on my available supplies?
Andrew Jonathan Fine