You can use this files:

http://www.cooksongold.com/Jewellery-Tools/Diamond-Files-Set-Of-5-prcode-999-3801

or burrs: www.cooksongold.com/Jewellery-Tools/Diamond-Burrs-Med-Set-Of-30-prcode-999-6388

the best for me is this Diagrit,its quick,easy and you can use it on domed and also flat surface: http://www.cooksongold.com/Enamelling/Diagrit-Coarse-prcode-860-116

there are coarse,medium and fine Diagrit.

R.

Alundum- and Carborundum stones works very slowly and it is a hard job. Since more thn 30 years I use for all grinding and polishing work only diamond-tools. To use these are much more quicker and much more hands preserve.

One can find different diamond-tools. From diamond coated, unflexible metal-files, over flexible pads up to diamond coated wheels and discs in different dimensions, from little discs and milling tools up to large wheels and discs for electrical grinding machines.

If you want to grind by hand, I recommend Diamond-pads, because they are flexible. By this, the pad-surface adapt to the domed surface of the working area. Prima facie it seems, that the pads are very expensive. But it have a long durability and work much, much quicker than any kind of stones.

Here one link, where you could buy such pads.

http://www.diamondtoolstore.com/store/index.php?main_page=product_info&cPath=6&products_id=329&zenid=c896d02613138890270ffa7263302285

If you google you'll find much more supplier.

I myself grind and polish my cloisonné-work since more than 30 or 40 years only with electrical tools. To begin I work with a commercial lapidary machine with 4 wheels. Such an equipment is very expensive. So I built a very simple, but effective grinding machine by myself. With this,  grind and polish  I cloisonné work up to a dimension on 10 x 10 inches.

Here a link to the construction manual.

discussions/1-1000/725-gomkopie.pdf

Edmund

Thank you Rudolf and Edmund for your replies! I'll be looking at your recommended links within the next few days.

Sorry for the slow response... life has been nuts around here lately... I'm moving my studio to a warmer part of the house - yeah! Should bring even more productivity to my work. Thanks again.

Kathy

This is from Edmund how to make low cost polishing machine.

Hallo Rudolf,

Thanks, that you pointed to the manuscript. I would be interested if anyone has copied the machine. The reproduction is very simple. And grinding and polishing with the machine is so time-saving, bone conserving and easy. I may never grind again with stones or other hand grinding tools.

Edmund

Sure I will make this machine one dayBut I need buy the diamond belts and other equipment.My friend blacksmith have old fashioned grinding stone like this.Is it very quick to grind metal,maybe also enamel ,but maybe too large for enamel workshop.

Picking up my old thread here... Thanks for this response Trish. I'm curious to know what size diamond wheels you used, if you remember. I wanted to try this with a flex shaft, and a 22mm diamond disc was recommended with a screw mandrel on a flex shaft. I'm concerned that there wouldn't be enough disc to work with, and the screw part of the shaft would gouge the enamel. Does anyone have comments on this? Thanks...

I'm looking for a faster method of grinding and polishing domed cloisonne enamels. I've been using alundum stone by hand but would like to try some type of rotary machine to make the process go faster. Rio Grande states that alundum "grinds enamels quickly without contaminating glass particles" and this concerns me. Can anyone recommend a safe abrasive/rotary method that they use?