This is my restored '48 Chevy 1/2 ton truck. For the first few years I went with a polished stainless-steel look on the raised ribs. It was followed by a few years of a silver paint look. The raised ribs were originally painted a slightly different color than the dash color. It took me a while to track down the correct color. It is a grayish brown color--not silver. I carefully masked off the areas and used paint in a spray can prepared by a local automotive specializing in automotive paints. A very fine brush was used for touch-up.