In which case that's a little out of my depth.
Thinking about it, the biggest issue is going to be adhesion to the film, and then protecting it enough that you don't rub it off when cleaning it (even electrics need a clean once in a while!)
I have in the past toyed with the idea of using a beugler pin striping tool for trim lines and panel lines, which would mean you could possibly fill it with something that will stick to the monokote, but you may well be the first person to do so.