Amsterdam - Expert Acrylic - 150 ml - Burnt Sienna - Amsterdam Expert Acrylic paint is a heavy body acrylic paint, suitable for working with brush as well as painting knife. This acrylic paint has a high degree of the purest pigments which guarantees strong and intense colours. Amsterdam Expert is formulated with the highest degree of lightfastness (+++), as the original colour remains unchanged for at least 100 years (under museum conditions). A large group of colours are mono-pigmented, thereby producing the purest colours when mixed. Amsterdam Expert Acrylic paint is an exceptionally durable and flexible paint film due to the basis of 100% acrylic resin.