Finished prepiong the plenum for paint, # coats of Smooth Prime, followed by sanding, in between each coat. eventually finishing w/ 330 grit. Not a lot to discuss here. I did FINALLY learn that in order to get the Smooth Prime to spray properly and not clog the gun, it needs to be thinned pertty well, way beyond the dilution recommended on the container, almost to a watery consistency. With it so hot, it was pretty eay to shoot that way as it dried pretty quickly.
