I recently did this with two of my own frames using a paint pen that I got at a craft store. The one I used is made by Kuretake and the brand is ZIG Painty Twin. Mine has gold at one end and silver at the other. They also come other colors, both double ended and single. Cost was $3-4. It was very simple to use, just stick the tip in the grove and trace. You could also use it for pinstripes or to create a script, if you have the skill. The only drawback was that I was only able to use the pen one time. Even with the cap on, the tip dried out and would not flow. So I cannot tell you how many lugs you can get from one pen.