House of Kolor paint was formulated by a custom car painter wanting to do glamor candy and pearl paint jobs. His last name started with a K and that is why they spell Kolor with a K to promote their brand. It eventually got bought out by Valspar paints. Over the years their formulas have changed. I got started using it 35 or so years ago to get more eye popping results than I could with Dupont Imron. One of its problems for covering bicycle frames by some professionals was that the paint would separate between layers when it was hit. The reason for the separation was that those painters did not keep within the recommended time windows between coats. It was more efficient when doing several frames at a time to wait longer so more frames would be ready for the clears (or whatever came next). I was always very strict about staying within the recommended time windows so that I didn't have unhappy customers. And I never had trouble with paint separation. My experience is entirely with H of K paint and I have no knowledge if other kind of paint is more forgiving.

I also almost always spray a sealer coat between the primer and color coats. This serves multiple purposes but most importantly creates better adhesion. This would be too much bother and expense for a hobby painter. I love H of K primers because they work well and come in primary colors (red, yellow, blue as well as white and black) so they can be mixed so the primer color is similar to the top coat colors. I've converted a few of my fellow pros to using those primers because of its advantages. These primers could work very well for hobbyists too. In fact their primer colors are so good they can be used as a color coat.

This is a bike I made and painted for myself using only H of K primer colors including the yellow and blue decals. They are painted on. I put an additive in the clear to create the matte finish. I made the frame in one of my framebuilding classes as an example to students to show them how to braze.