Hi Elaine,
It is not really important that the primer "look" even, so long as all the surface is covered. Primer does not have a lot of "hiding" power, it's purpose is to bond and seal the surface.
Allow the primer to dry, sand lightly (120 grit) just to knock off imperfections and smooth down the surface. Apply two coats of Acrylic finish paint in the sheen of your choice.
Hope this helps,
rmichael pro painter