Good morning everyone!
I have finally finished up my video on how to varnish an acrylic painting. This is a final step that a lot of artists skip and they really shouldn't. The final varnish coat is meant to protect your artwork for many years to come. Often we don't think about the environmental elements that are wreaking havoc on our paintings. Dust, dirt, UV rays, etc. The final varnish coat protects your work from all of this. When you purchase a varnish I would make sure to choose one that won't yellow over time and is removable with mineral spirits or some other medium. You want the varnish to be removable in case someone in the future needs to touch something up on it. (say it is damaged somehow and needs repair) Also, this is handy in case you find that you need to add something else to the painting.
Varnish is also a wonderful way to bring out all of the rich colors in a painting. Sometimes certain paints will have more gloss while other colors remain matte. Adding a final varnish will help to unify the texture and gloss of the entire piece.
When choosing a varnish you can choose matte or gloss. I usually prefer gloss because I like that "wet paint" look, but matte varnish works just as well.
Anyway, here is my video demonstration. Enjoy!