Can you mix metallic paint with interior acrylic paint?
You can mix similarly based paints together. House paints are either oil or water-based. So if your metallic paint is latex, it can be mixed with your acrylic, which is also water based. Read the labels to get your clue. There’s no way to predict whether you’ll be satisfied with how the mix turns out, so test out a bit on a piece of drywall, or a sample of wherever you want to put it, first.