What is a Varnish for Acrylic Paint?

Varnish is a way to protect your painting done with acrylic paint and it also allows the colors of your acrylic paint to come out. Make sure when you are applying varnish to your acrylic painting that it has had adequate drying time and that you clean the painting so it as no dust or dirt on it and then apply the varnish with a flat bristle brush