Yes, you can, but it will smell for a while. Best do it outside or in a garage.
There is a brand of paint sold in most hardware outlets for painting plastic or vinyl . This paint does not need primer first. It is called Krylon Fusion.
Yes, you can. Primer will grip to almost any painted surface.
depending on the surface finish of the primer. Noirmally its matt in its appearance and will take a water based gloss. However, a primer should have an undercoat applied first unless its a primer/undercoat.
Yes, you can,
Yes, you can,
Yes, you can, That's the normal way.
Start with a primer, Perma Seal is great. then I would use oil based paint.
depending on the surface finish of the primer. Noirmally its matt in its appearance and will take a water based gloss. However, a primer should have an undercoat applied first unless its a primer/undercoat.
Yes. Clean and degloss the oil based paint, apply an oil based primer, then apply the water based paint.
If you are painting lettering directly to the plastic, there are single part epoxies that are available, some suitable for outdoor use, that would adhere to plastic without having to use a primer. If you are going to paint the background a solid color, you can use a special primer, formulated to adhere to plastic, then paint it with an acrylic paint which can then be coated with the same type of acrylic paint for any lettering and design.
Yes
yes. However, you cannot use an oil base paint over a latex primer. If you change your mind on the paint, you must strip the paint before you use an oil based paint on the primer.