I'm building a new box & amp rack this weekend & I plan on painting it white to match the exterior exactly. Instead of fiberglassing over the MDF I always just spray on a few coats of low build primmer then my base coat/clear coat. My problem this time is that I don't have my spray gun right now so I'm looking for a good ROLL ON, low build primmer that someone might have used & had good results with it?
