8-1 ?
Yes, base coat is 8 to 1 on the hardener, instead of a 4 to 1 on the hardener. The higher the number the stronger the hardener. So what my painter has been teaching me....
When we used a single stage enamel when we when to cutt the paint to buff the final coat the paint couldn't take a very high grit of sandpaper. We had to scratch and repaint the box. Typically on a base coat clear coat we can cutt the paint with a 1,000 grit sand paper and than buff it to a glossy shine.