That sounds about right, the only thing I might add is appropriate coverage and dry/cure time. If it looks good at 4 coats, let it go, more is not better, it's a black base coat. Its only gonna get so dark. Normally 24hrs is sufficient time to dry/cure, so that sounds right, it's what ever the mfgr recommends, I'm not familiar with the 1k, 2k products.
When you go to wet sand between base, color and clear coat don't use a new sheet of paper, use one that has been used a little bit. New paper is a little sharper/less flexible and can/will take off more surface color than you'd imagine (think sand thru). Remember your just scuffing the surface, to improve adhesion and surface continuity (dust that sometimes embeds in the surface), so go lightly. Use a little soap (a couple of drops) to your bucket of water, helps keep the paper clean. Cleanliness is your top priority, wipe it down good clean and dry between every process, especially before applying clear coat. Check your time between coats, again what ever the mfgr suggests, it'll minimizes problems like runs, and reactivity between coats and improves surface finish. I normally start with the underside of the tank, get used to whatever spray pattern and paint texture your working with under there.
Then check your weather, look for a 2 day window of good consistent weather, 1 day for color, 1 for clear. Done.
A week in between is good, check with whom ever is supplying your graphics about applying clearcoat over them, never hurts to ask. I normally sand right before applying clear over graphics. But that's me. Shoot your 2 coats of clear and see what you get.... Personally, at this point, once it dries 24hrs later, I'd sand it all back with 4 or 5000 grit and apply another 2 light coats. These are the coats that give you the margin of coverage to sand and rub out for your final finish, but that's up to you...
My apologies for the long winded rant, painting's not cheap anymore, so getting it done right the first time is the best advice I have. Good luck...
