My log home was built in 1988 (white pine)and was finished with CWF a couple of times the last CWF-uv at least seven years ago. It has darkened quite a bit to the point of looking dark brown/dirty. Have been power washing – looks great. What is the best finish to use at this point in time? We would like it to remain lighter and bright – honey-like. We live in a wooded area in upstate NY – Endicott. Also, how long should this new finish last and can re-power washing be avoided by inexpensiv