Use this high quality galeria matt acrylic varnish from winsor and newton to protect your painting and ensure the highest quality finish and excellent longevity this matt effect varnish will protect your finish painting from the build up of dirt and grease and if it itself becomes dirty it can be removed without any damage to your paintingthinly painted acrylic films may be vanished after 24 hours of drying time but up to a week of drying time should be allowed for heavy or impasto layers b