Well, I think I can tell you what paint not to use. I followed this technique described by Greg Heacock:
"To get the nice black edge...
When you get the perspex or Lexan sheet stock, it will have a protective plastic coating on it. Leave that in place! Cut your window pattern and trial fit everything to the door. When you are satisified with the fit, make a depth gage with small blocks of wood that has a razor blade for the scribe. Run the blade around the INSIDE of the window keeping the depth stop tight to the edge, slitting the outer most 20 mm of the protective plastic. Then peel the 20mm protective plastic edge off. Paint the exposed inside window edge. When the paint is dry, peel all of the protective coating off,,, you'll have a nice black trim. Good luck. Greg
This worked great. I had some black Vinyl paint that I had used to refurbish a treadmill I bought my wife some time ago. I thought Vinyl/Plastic/Acrylic, that ought to be perfect. And, for the most part it was. But, for some reason, on the two side edges, which were horizontal when painted, the Vinyl paint wrinkled the edge of the protective film and allowed a serated looking edge to form. I am going to see if I can use a long razor along the desired edge and then buff the paint off of the clear side. If this doesn't work, I guess I'll buy another piece and make another one. At least, I have a very good pattern this time, so it should only take about 20% of the time the first one took.