Keeping paint/India ink from bleeding into grain next to groove
I need to make several crisp black lines in BB plywood. The tip of a hunting knife makes a nice shallow groove.
I want to color the groove black and then sand away the black on the plywood leaving the black in the groove. How do I keep the black out of the grain next to the groove.
Then apply finish to fill in the groove (will that happen with water borne poly?) with finish or clear grain filler?
Another way to do this might be to route a 1/8x1/8 inch groove and glue in a 1/8x1/8 strip of wood, sand it flush with the plywood and then be dyed/stained it black and glue in place.