Concrete with what appears to be algae and rust stains. I figured I wouldn’t be able to touch it with downstreaming and I don’t have an X-Jet yet but I’m not opposed to purchasing one, I just hadn’t needed one. I’m thinking X-Jet 4% SH with a tiny bit of Elemonator, dwell, rinse and follow that up with some Oxalic…maybe agitate…am I on the right track? I have done mostly vinyl to this point so I’m not terribly experienced with concrete yet.
4% may be a bit strong. It may not be rust. We get a lot of red algae on vertical walls around here. Get a spray bottle and test it.
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What type of material is the top half of the building never seen anything like that.
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Thats a lot of area to be spraying ox acid. at 1c:1 gallon I cant imagine even trying that
I’m not sure what it’s made of…might have to get on a ladder and get a closer look. It’s not like anything I’ve ever seen before either.
May look at getting some F9 it looks like a mix of organic\rust stains.
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