I just taped, mudded and sanded my drywall, when do I prime, before or after I spray on the texture?

Answer 1

Before

Answer 2

Wallboard with no texture:
If your wallboard has not been textured or it has been "skim coated",a latex primer is a must.
Primers seal the surface to equalize paint absorption, and minimize surface texture variations. A good quality latex finish paint such as a satin enamel will give you years of trouble free painted walls.

Note: If you are going to apply a heavy texture to new drywall ceilings you should always prime first with an OIL base primer to stop the wallboard from absorbing water from the texture resulting in sagging.

sorry, I lost the exact page I copied that from, but here's the URL for the site and more info:
http://alsnetbiz.com/homeimprovement/texture.html

Answer 3

Before; and if you're planning on painting, you can mix the paint in with your mud and then spray the texture, saving you the giant step of waiting for it to dry and then having to paint.

Answer 4

after texture, before paint

Answer 5

before