Onelow, I'm not sure if the 2k is compatible with the Ful-thane bc. Shoot a test panel if you don't get a bad reaction it should be o.k. I looked at the tech sheets and would guess that the two would be compatible. They shoot over the 422-23 sealer and topcoat with 496-00 Select clear. I don't get any commission from Dupont on the 496 clear, but it sure is about as good as any other clear I've shot lately (and I've shot a lot of different clears over the last two years). Get a copy of the Nason tech manual if you are going to use these products, your jobber can print you a copy. Best of luck, TC