I'll go check my instruction sheet again. The advice against dope was explicit (or so the memory cells recall). It didn't say all paint, just dope. I have painted some with Rustoleum and it seems to stick ok. However be careful, because if you overdo it you lose some advantage of the lightness. But it is strong stuff and once stuck down it is pretty tenacious with all the fibers sticking--and pulling away if you unhappily try to pull it off!
So just checked the instruction sheet. It says:
Painting1. Pre-Primed Micafim can be painted with Black Baron Epoxy, 2 part epoxies, polyurethanes, or enamels. NO SANDING OR PRIMING REQUIRED!
2.--stuff about using BB Clear if you are happy with the color of the pre-primed.
3. Do not use dopes or lacquers! They do not provide adequate adhesion.
4. All Micafilm is totally fuelproof, including pre-primed.....
I notice on rereading, it is talking about the pre-primed (a grey colored product) and nothing about the colored versions---these instructions came with a colored roll. So they really are making no comment about the colored stuff, so I wonder if anything works well on it.
I remember Dan's Stunt News articles on Micafilm--I think they were mainly in his old district column. Without going back and looking, I recall he recommended a Micafilm/Monocote hybrid, with I think the Monocote being the top trim-like layer, providing a sealing function.