jaguar

You could definitely paint them! I would probably do a test one first to make sure the paint works well and the top coat doesn't bleed or smear. The downside would be paint maybe chipping off, but it should work pretty well.

For the stones I used ones that were nickel to quarter size, so around half an inch across. you could go bigger if you want to, but I probably wouldn't go any bigger than an inch or so. Smaller ones worked for me because they are easier to carry around. As far as cutting the stones, the wheel worked way better for me because all the runes have straight lines. I just watched closely, and didn't go too deep and over shoot the lines. I probably wouldn't be steady enough to do lines with just an engraving bit, but you could use the engraving bit to make the cuts deeper and cleaner. Hopefully that helps!