I got some brass powder from eBay which was quite fine. I carefully loaded it into some cracks inside an oak bowl I'd made and dripped thin CA glue onto the surface of each mound. The glue formed a ball that rolled off the powder and soaked into the wood before eventually soaking into the powder. The end result was slightly proud ribs of brass and CA. When dried these were so hard that they were an absolute bu%%er to turn to the level of the surrounding surface. Scrapers and gouges were used and were quickly blunted and the ribs eventually got down to the level of the wood before sanding. Nonetheless, the final finish was more or less what I wanted although I think I could have used a darker metal (bronze?) to give a more contrasting result.
A previous attempt was to mix the powder with Araldite and heap it into a groove I had cut into a bowl. When cutting the mound back, the epoxy cut much better than the CA mix but it still blunted tools quickly. The end result here, though, was a dark grey fill with bright, metallic sparkles. Not very attractive. I suspect I could have used a higher powder to epoxy ratio, but the CA version is much closer to a metal vein in the wood.
Good luck in your endeavours and let us see pictures of your results with explanations of how you got there and what you'd do different next time.
Steve
