This is a 10 year old home built in moist and shady area. A light color stain was used and mildew was under the stain and turned the logs grey. We media blasted the finish off, sanded with Osborn brush, applied Penetreat and applied two coats of Transportation Log and Timber Stain (color brown tone medium). Stay Clean I/E Mildewcide was added to the stain for added protection along with Impel Rods in a few splash areas.