You can paint directly onto it with an oil based paint like Tremclad.
There is special High Heat Tremclad for that purpose.
Yes, with a good primer, then Tremclad or Rustoleum paint.
Tremclad spray.
I used Tremclad on manywood surfaces, especially these days it comes in a variety of colours. For example : Old particle board cabinets with or without the mat-tack- surface, or wood furniture where high use will be such as table legs, chair legs, outdoor furniture. Although Tremclad is still best on metal surfaces. Gerry Ottawa Canada
No, it won't work. Use regular paint thinner.
Tremclad spray paints work on Lego
Yes, you can.
Tremclad enamels is a good choice for that
I have painted and repainted an old claw bathtub outsided, I paint it a different colousr every few years and I use tremclad rust paint. It hold up well in direct sun, 35C below weather and rain. I'm considering using this paint for my indoor bathtub.
Use Tremclad spray, mask off the window part.
If you choose a paint suitable for both. Rustoleum or Tremclad should do the trick