The deck is treated wood, and is about 8 years old. There was a lot of
mildew and areas of mold before I cleaned the deck. I do it about every year
and a half , applying Thompson or another protective coating after cleaning.
This year I used a bleach solution, and for the 1st time pressure washed the
deck. Before I apply the preservative, how do I get rid of the white almost
salt like patches?