I am about to begin painting my interior. I hope to spray it as this will allow acess to all the little nooks and crannys. Is it neccessary to prime or undercoat first ,I was planning on using pettit easypoxy. Ihave used this in the past with good results. They also make a interior paint called dura-white (it is water base) does anyone have experience with this? Any tips would be appreciated, thinning ratios etc. thanks scott - 269