we removed old paneling, primed the plaster wall with Kiltz(latex) then applied joint compound in a texture design. we followed directions for adding water for milkshake consistency to joint compound. we applied to wall with metal putty knife and also used plastic putty knife. Once joint compound started to dry you can see dots in the compound. these dots were not in the plaster prior nor the primer. what has caused this? can I paint over with paint or do I need to prime again?