Firemanmike
New member
This black stuff is everywhere in my area. This type of building material is in my neck of the woods. (N.Texas) Was wondering how I would clean this because no one seems to be doing it. I have a 8gpm Hot water machine with DS and xjetM5. I sprayed some 50/50 bleach + H2O on some of that type of brick vener on my mailbox and left it for a good while and it didn't touch it. But like I said it was just out of a little squirt bottle. Any help would be great
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