Standard solar rez is for fiberglass board. Since your board is expoxy you should use an epoxy ding repair kit. They aren't as common as your typical ding repair kit, but they sell them at most surf shops. The fiberglass based solar rez won't provide a high quality fix.
Clean your hands before you use the keyboard. Sure it can be a bit of a pain, but it will keep your keyboard clean. To make this a bit easier you keep a can of hand sanitizer next to your computer on your desk.