I had a steel frame sandblasted and powder coated in a single color for a reasonable price. Is the Shiv carbon?

I painted a carbon fork. I ruined it. I took a high gloss red paint and sprayed it, several layers. Looked good. Between layers, I'd wet sand I, I think around 1500 grit. I did this several times until it was very uniform. It looked pretty good. Then I sprayed it with a layer of high gloss clear coat and in the next few minutes the entire thing went full on alligator skin. Actually, I don't know the technical term. All the paint cracked uniformly in the same way a mud puddle in the desert dries. After the clear coat dried, the effect sort of settled down but it couldn't be polished or buffed out since the clear coat was covering the cracking.

I tried again with either longer or shorter cure time for the initial coat, same effect. I'm sure the clear coat and paint were incompatible even though everything I read said they were. I got so disgusted by the project that I binned the whole thing and put the steel fork back on my bike.

If I were to paint a frame again, I'd do it on a dumpy commuter to make it look less attractive to thieves.

There are some pretty high quality rattle can paints out there. You might be okay. I'd highly recommend avoiding a clear coat.

It sounds like you've got a lot of bikes. One bit of advice I got once, and I'm not sure if it's even true, is that high quality spray paint can get as hard as a good paint. The problem is that it takes much longer to reach its hardness. I think his plan was to hang it from the rafters for a year. I think I read someone here was going to build a greenhouse to keep their frame in, to speed up cure time.