I belt sand in my garage with the door open. I then blow out the dust With a blower. I wear a mask when I do that also. It does a pretty good job. But when the door is open, the dust settles on it. then when it closes it gets wet when it rains. My wife wants to know why the garage door is turning orange. Of course I told her “ I don’t know” Any tips on how to clean it? A pressure washer is t doing it.