<p>SamuraiLandshark</p>
<p>Some painters will dilute the paint for the sprayer and also if they purchased the paint themselves it saves them money to dilute it. The people that painted the inside of my house tried to dilute the paint and I said no, then they charged me more. Needless to say they were not the same painters that painted the outside of my house. In the Office buildings we had, we moved walls all the time and never primed and an undiluted coat of Dunn Edwards always covered it nicely. You do clearly have to sand the seams first though.</p>