Marvin Windows and Doors adds Factory Stain and Clear Interior Finishes to the existing option for factory-applied painted interior finish. The multi-step process for both the stain and clear finish are completed before the windows or doors is assembled. The waterborne acrylic enamel used on the products is environmentally friendly. The six stain options to choose from are honey, wheat, hazelnut, cabernet, espresso and leather. The stain and clear finishes are available on pine, white oak, cherry, Douglas fir, cedro macho, mahogany and vertical grain Douglas fir.