Painting plexiglas

[OneKiwi]

Hi oh wise ones

Q time, I have some plexiglas that I want to use as a pit board so Id like to paint some stuff on it.

Whats going to work well and hold well?
Im looking at painting on the underside and thinking a book cover film or a clear coat of something.

Will flaskolor work?
Normal non rc specific spray can paints?

Thanks