Paint Experts: Process Advice Needed

I have been using TCP global custom shop epoxy lately and it sands/scuffs fine. Its not meant to be sanded smooth, just need to scuff it to get bite for the next layer. Sometimes I will spray epoxy and let it flash for an hour or two then come back with a coat of surfacer primer. No sanding required between coats typically for epoxy within 24 hours but check the tech sheet for the product your using.
https://tcpglobal.com/collections/epoxy-primers