In the world of art, acrylics are the new players on the scene. They have only been around for about 50 years, but have already proven to be a favorite medium for many painters. Acrylics dry incredibly fast, allowing for many layers to be created on surfaces quickly and easily. This quality can be both an advantage and a hindrance. Acrylic mediums are available that slow drying times, making acrylics behave a bit more like oils. Acrylics dry to a plastic surface that is water-proof. They can also be thinned and used like watercolor paints.