Raptor-Liner uses a catalyst and is sprayed with a Shutz gun. My son sprayed it - two coats, I believe. Some kits come with the Shutz gun. A paint/body guy I know recommended laying a black base coat first to ensure color didn't show through anywhere. Don't know if it's really necessary but we did it anyway with black epoxy.

We really like the look of it and would use it again.

My son says he'd consider it one heavy coat, not two.

Would you happen to have more pictures of when you did the 4 linkinstall. I just ordered the same kit for mine and trying to see where to set it.