Krylon has a new spray paint specifically designed for plastics. I
haven't tried it yet.

Ben Smith wrote:
What do you guys use for painting interior plastic?

We will be out of annual for a couple weeks 'cause our A&P is busy, so we're
going to work in the interior. We'll order various new pieces from Plane
Plastics. The parts come black right? We'll have to paint the new pieces,
and re-paint the yellowed but reusable ones.

TIA