Hard Covered: Luaun is a durable choice although it does add weight to the unit. Proponents of hard covered flats point to the amount of abuse these units can take either on stage or in transport during touring situations when these units are often crammed into a truck after each performance. Hard covered flats can be more difficult to paint as the surface absorbs the first few coats. Scenic artists usually prefer a surface more like canvas when painting and often find the painting of luaun to be a bit of a challenge.