two ways to do it I can think of other than what's been mentioned.
If the surface is flat, then the milled part will be lower. You can spray the whole thing then take a flat sanding block with some fine sandpaper and it will sand away all the paint other than the recessed areas.
Second way is to use a toothpick and dip it in the paint and blot it into the engraved area (this works well for highly detailed parts).
Only other thing I can think of is to use some kind of easily removable adhesive - mill through it, paint, then remove the adhesive (like you said). I'd consider trying something like nail polish, or maybe elmers glue. If you get paint that won't be taken off by acetone, the nail polish would work great - just wipe it off when you're done. |