Phil that's pretty trippy, cool how you have so much depth. True. If you got it down you could skip the Sanding and Curing process to get a black starter and just keep running. But, unless you got a real smooth spinner, controlled environment, and some practice, you can get some irregularity, uneven build up, waviness. If you do it all in one shot and then decide that you want to give a flat sand and then clearcoat, you might wind up sanding off some of your Blues. For this reason, it can be beneficial to use a two step process where you start with a flat all black base, then add your colors. That way if things get crazy.. ie dust, bugs, uneven waviness, lumps, etc when you sand flush you'll still be having some of your blues in place after you sand. I never had a really controlled environment for Epoxy finishing, ie completely dust free, but if you can fashion one, and you have a smooth spinner, ie no jerky motion, then you can do it all in one continuous process.