I need to paint a thin black outline around a front windscreen of a race car, should I paint it ( airbrush) before or after I've "Futured" the front glass, I intend to superglue the glass, thus the "Future". I use acrylic paint
Cheers
Joker

Hi Peter.
Future the windscreen first.Not only will it give the transparent plastic a great finish,it will also protect it from any sticky residue on the masking tape.
An added bonus is that if you get any overspray from painting the fine line,when you scrape it off with a cocktail stick or similar, you'll be scraping against the Future and not the plastic itself.
Hope this helps.
Nige