Basically I am grinding a cloisonne enamel piece to level the
wires with the enamel and want to take it to mirror finish through
Not addressing your abrasive comparisons, but cloisonne finishing.
You can approach this task as if it were a lapidary (gem cutting)
task. I've done a limited amount of cloisonne, but had excellent
results finishing the pieces on my Genie diamond lapidary set up. If
you have access to such resources, or know someone who does, it is an
effective solution. One advantage is that the final step would be a
lapidary polishing, not strictly finer and finer abrasives.There's
still debate about the scientific details, but it is a generally
accepted fact that the surface molecules actually "flow", eliminating
the finest surface scratches left by the last abrasive process.
It can also me done manually, but of course, takes a lot longer. You
can do the final polish with a felt wheel on a flex shaft, using a
slurry of cerium oxide and water. A makeshift splash shield would
probably be desirable. You don't want it to be dry, nor dripping, but
kind of maintain a dampness, if you can.
All the best,
Charlotte, NC (USA)