Turtle shell and turquoise. I tried them before, and if you make the spots turquoise and in the right shape, it'll look great. My second choice would be light red and purple. They go good together, too.
what kind of paint does O'Keeffe use
The usual kind of oil paint.
I would use pinstriping paint, One Shot is a common brand, Sold in most art supply stores
Oil paint.
Createx makes a great water-based paint for air-brush that works well on fabric and leather.
Use oil based enamel paint.
what kind of paint does O'Keeffe use
I would roller it with latex.
Yes, you can paint a design on a vinyl mailbox/post. The type of paint you would need to use is a latex exterior paint. This is the type of paint you would use on the majority of outside projects.
its called "sign painter's ONE SHOT"
The usual kind of oil paint.
No paint!
The usual kind of oil paint.
Yes. The result would depend upon the airbrush you would use.
I would use pinstriping paint, One Shot is a common brand, Sold in most art supply stores
Paint can protect iron from rusting, especially if it is the right kind of paint - you would not want to use a water based acrylic paint, since the water in the paint would promote rusting, rather than preventing it.
Oil paint.