• Apple Barrel Multi-Surface Acrylics dry with a beautiful satin finish. Created with a sealer built into the paint formula, there is no need to add varnish or spray finish. However, should a layer of extra protection be desired, apply a brush-on water-based varnish, or a couple light mists of a clear acrylic spray sealer for protection. Keep in mind, the layer of protection may change the sheen to a matte or gloss finish from the satin finish of the paints, depending upon the type of product used.