The hand engraved lines on the original photo I was using, vary in width and I wanted to keep the look, so I went with the HD engrave, but I keep meaning to try it on score to hopefully speed things up. An hour is too long for me to stand around.
Very fine lines, running from about .0065 to .008 inch, or if you perfer metric, .17mm to .2mm.
To get the paint to fill with spraying, the engrave needs to be pretty shallow and you need to hit it as straight on as you can with light coats. If the paint builds up on the edge of the engrave it chokes the opening and makes it even harder to hit the back of the line. I have found with deeper engravings that the first couple of coats will seal the edges between the masking tape and the material and then you can push liquid paint in with a fine brush and it works well.