I'm doing a bathroom remodel. We've put up greenboard on the walls and cieling, however the tub/shower stall has ceramic tiles on a 'float' system.

What I'm wondering is do I need to 'prime' the greenboard before texturing? I have a texture gun and am not sure if I should put a thin layer of compound down then texture over, or if I need to prime with a primer such as Kilz then texture?

If I do need to prime what with? I've heard both use and don't use latext primers. HELP!!