Oiled oak . Wood finishing starts with sanding. Once the wood surface is prepared, the finish is applied. It usually consists of several coats of wax, shellac, drying oil, lacquer, varnish, or paint, and each coat is typically followed by sanding. Finally, the surface may be polished . Danish oil is a wood finishing oil, made of either tung oil or polymerized linseed oil. Danish oil is a hard drying oil, meaning it can polymerize into a solid form. It can provide a hard-wearing, water-resistant satin finish, or serve as a primer on bare wood before applying paint or varnish. It is a “long oil” finish, a mixture of oil and varnish, typically around one-third varnish and the rest oil.