I just bought a log home built in 1989. Haven't even moved in yet but I've discovered Perma-Chink's Web site. Seems I'll be in touch with them soon. I'd like to start out on the right foot. I don't know when the exterior of the house was last cleaned or treated so I'd like to do it ASAP. Is it a good or bad idea to pressure wash before using Log Wash or other such product and before treating with stain and topcoat?