| Same happened with the house we bought 2 yrs ago...the eaves looked water damaged or mildewed when purchased, but there was no water getting to the undereaves, even in the hardest rains...and nothing lightened the wood either... not bleach, not oxalic acid...
ended up stripping the outer layer off with an aggressive drill attachment that has rows of carbon filaments that spin... looks like a torture device.
anyway, it gouges the wood in some places more than i'd like, but not so much that i couldn't tolerate it. after two new coats of stain the undereaves look great. well see how they weather over time.
the one disadvantage to this method is it is killer on the back and cleans inch by inch. took three separate days to run the length of the house and my back HATED me for it. add that to the fun of wearing safety glasses and a mask in the summer heat and i was all funned out in no time. so we only did a main section that is public. next summer will spend too many hours cleaning the rest of the undereaves.
but it did look great. |