Originally Posted by hikerjohn7
Thanks for the answer. Do you rinse the Simple Green off the roof before you scrub with the Turtle Was car wash and McGuires Gold car wash soap?
No! Just start scrubbing with the brush.
We wintered in central Florida a couple winters that in about a week the roof would be nearly black from the smog, humidity & heavy dew every morning & parking under the trees just made it worse, this procedure was the best, inexpensive, easy to do & worked great.