I painted my lexan window borders with the Jerry Bickel border paint and did not get good results.
I prepped the windows by scuff-sanding, followed by compressed air and a tack-cloth. The Jerry Bickel paint has little pigment, with the result that multiple coats are necessary. Perhaps because of this, when the Fineline tape was removed along the paint edge, it left a jagged edge. The problem was made worse by poor paint adhesion. The poor paint adhesion also caused problems with subsequent handling and installation. My windows are screwed into place with nylon screws and thin weatherstripping, with the non-adhesive side against the windows. When the windows were subsequently removed, some of the paint came off as well, leaving unsightly non-black areas in the otherwise black border.
The job needed to be redone, so the windows were removed again and I discovered that the old paint could be chipped off with just a fingernail. I removed all the old paint by scraping, followed by sanding.
Not wanting to do the job three times, I bought three different cans of paint to use on a lexan test panel:
1) Rustoleum paint for plastic (black)
2) Krylon Camouflage "with Fusion Technology" (Ultra Flat Black)
3) Kylon Fusion All-in-one paint+primer (Satin Black)
All three of these paints were much better than the Jerry Bickel paint. All three covered much better, with fewer coats, a much cleaner edge and much better adhesion.
After 48 hours cure, none of the three paints could be scraped off the test panel with a fingernail.
For paints #1 and #2, you could see a shiny area where the fingernail was scraped. For #3, after rubbing with my thumb, I could hardly tell where my fingernail had been scraping.
Paint #1 had one little "jiggle" in the edge line. This might have been an issue with the panel or the tape, but the other two did not have this issue.
In the end, I thought paint #3 looked a little better in terms of final appearance, so that is what went on the side windows. The final result looks good and is much superior to the initial attempt with the Jerry Bickel paint.