Murals can be painted on most surfaces and are a permanent fixture when painted on walls, ceilings, or floors. The artist prefers to use acrylic for it's durability and color fastness,however she can work in oil if you prefer. (please note that oil has a drying process that adds to the completion time) Per a client's request, she even produced a mural in pencil, followed by spray varnish. Even for acrylic murals, Janet does suggest a water-based clear varnish for extra protection. http://www.janetleestudio.com/muralstrompeloeil/muralfeesinfo.html