Filling engraving on a rubbber screwdriver handle.

[Alan Moberly]

I have been engraving and filling prototype handles for a customer. For the fill material I have been using latex paint. Production will start in a few weeks and I am looking for suggestions on alternative fill materials.

[Nicolas Silva]

Acrylic paints found at your nearest hobby shop will work. You get lots of color choices including metallics.
Rub N Buff is another filler. Or Laserbits has some pretty good fillers although pricey.

For woodturned items we use a lot of powered metals or stones set in with CA glues. But you'll have to sand a bit to get it smooth again.
Cheers!