MY INTERIOR ON MY 89 CHIEFTON IS SPOTLESS-HOWEVER I HAVE 2 DELAM SPOTS ON THE RIDERS SIDE ALONG THR AREA WHERE AWNING LEGGS CONNECT--IT WEEMS AS IF THE PLYWOOW IS ROTTING OR IS DRY ROTTED-HOW CAN I FIX THIS FROM THE OUTSIDE-THE AREAS ARE APPROX THE S...