There are three main kinds of varnish: matte, gloss, and satin, and they each come in a spray and pour on version. Matte varnish gives a more muted, flat look to the painting and it doesn’t make any glare. Gloss varnish is super glossy and really enhances the painting making the colors super rich and saturated. Satin varnish is in between, giving a much softer look than the gloss, but not as flat as the matte. Spray vanish is less expensive and lower quality, and it dries faster than the pour on varnish. This is a great option for paintings on paper...