HI, I live in a Lindahl Red Cedar home that was built in 1987 that is out in the woods. The original owner painted the outside. We bought the house in 1997 Some of the interior walls are showing some water stain on them what should I use? Our 8 panel doors are looking dry also want to know if there is product to put on them or if they need to be stained. all of the ceilings still look great. Appreciate your help. Monica KenneyTolson