Hello I have started to paint after years of . I paint with acrylics using gesso as my white in my paintings . The first picture of the giraffe has gesso used the elephant was white acrylic . I like the gesso it gives less shine and will carry on with gesso . But what varnish would you recommend I want to enhance colours but not shine . I have a liquified matte medium gel can I use that on top of my paintings .