Hiya Paul
Yes you can.
I have twice used rattle can automotive acrylic over monocoat without a problem. But slightly depoloish with steel wool, then a light primer coat- almost just a dusting. Next, a few very light top coats to a gunfinish shine.- you don't really want to hard polish paint over monocoated open bays, other than a light hand buff to avoid stretching the monocoat