There are many different types of Dimension topcoats, and many are of poor quality. I have not mentioned much about their topcoats here, but I will say there are only a handful of them which are suitable for use on anything decent. The trick is to know which ones, and it's doubtful the average paint store employee knows anything about it.
What they have tried to do with Dimension is create a product for every budget, so that there are about half a dozen core resin technologies in play, and their tints need a lot of whatever resin is to be used in order to work. In a way, it is a really smart and fascinating way to get many different qualities of paint out of one line of tints. In another way, it is a horrible idea, because their 1K alkyd enamel is called "Dimension," and their acrylic urethane and high solids basecoat are also called "Dimension," even though they perform nothing alike. I wouldn't paint a garbage can with their 1K enamel, but I have vehicles out there, cleared with their top-line urethane, that look just as good 5 years later as the day they were sprayed.
But right now, I am only speaking of ONE product here, an epoxy primer that I have actually used and tested alongside SPI epoxy for comparison.
DP800 epoxy primer will not cause a failure, but it's not as good as SPI epoxy primer.
Bash away.