Have had some that are pretty old and having struggle used 10% concentrated. What’s your best why??
Are you using SH to try to remove oil?
Sh is for organic stains.
Also if im reading correct your saying the stain is “old”. Depending on how old its probably not going anywhere, the best you can do is lighten it up if you have heat and a degreaser. I dont mess with oil anymore, even after setting expectation customer is still disappointed.
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My dad’s driveway had a thick black oil stain on it from my old 4Runner… It being my fault, I felt obliged to try a few different methods to clean up the oil stain. After pressure washing the entire driveway I made a couple passes with hot water from a kettle, dawn dish soap, and a stiff brush. It lightened it quite a bit. Finally, I put the cheapest cat litter I could find at walmart on the top and then wetted it with a watering can to soak it without washing it away.
I came back two days later and the spot was gone. Really gone. It was a pretty rudimentary process, but it worked for me.
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Pretty cool stuff. Do you think this would work for people that are not happy with the results of their siding cleaning six months ago?
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No. The only solution for that is doing it right the first time. The pressure washer should be educated on the different surfaces he should be cleaning. Not the homeowner. If you can’t get it right the first time, reschedule everything else until you do. If you lose money consider it an educational cost.
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Thank you
