Use a single stage in engine bay. Search it on here, like three guys have used it and used preval sprayers or factory matched color in cans. I'm going to use the preval.
Good luck with that. I've had no problem running primer through a PreVal sprayer. I've had problems running polyurethane Delstar (TB3) both with and without clear coat through a PreVal. The paint clogged up the tube in both cases. I had strained it well to prevent that from happening and had shaken the paint well to break up solid/gummy blobs that had developed.
I thinned the paint to mfg recommendations. Maybe if I had thinned it more, it would have worked. I don't know enough about finishes to get creative with the proportions of the ingredients.
I do like the small size of the PreVal. It gets into small spaces a lot easier than a conventional gun.
