PPG sells very good single-stage Acrylic Enamels like DAR (you can add a hardener) and single-stage, two-part Acrylic Urethanes like DCC. Often a flattening agent is added for interior paints.

https://buyat.ppg.com/refinishProdu...dID=5d7b4ed7-f83a-4469-b68c-04551702a5df

A BaseCoat/ClearCoat (BC/CC) Urethane would be a two-stage system (also shown at the link above).

I use PPG because there is a good stockist nearby. I'd just as easily use Dupont if I had a good stockist nearby.