gbran

What type of acid do you recommend?

I've used Cleansol on oxidized painted metal for a commercial building, and applied it with a designated sprayer - then rinsed. Worked very well and never touched it with a brush. After talking with Bob at PT he said F-13 would do the same thing. When I conducted this experiment with the vinyl I had some Cleansol left over that was diluted 5:1, but it had been sitting around since May. The Cleansol didn't work as well, but it might if it had been fresh. I still need/want to go back and do the whole house, just haven't had the time plus it's been rather windy here in VA. As soon as I get the chance I'll post some before and after pics. The thing I hate about brushing is you can't tell if you missed a spot until the surface has dried.

Some of you may have tried this and posted about it, but I don’t have time to look right now. I’ve battled cleaning oxidized vinyl several times this summer, so I’ve looked for cleaning products and methods about it on here, and other boards with no definite answers. This past week I did some rental property for my parents and one house has 15yr old vinyl siding, which is a clay/tan color (originally). Over the years it has increasingly got worse with a white haze of oxidation. So, I mixed some F-13 4:1 in a pump up and applied it to small sections, rinsed, then applied standard SC house wash and rinsed again. Went back the next day after it was dry and what a difference! ALL the oxidation was gone and the vinyl had its original color with a nice sheen to it. I plan to do the whole house (and try different ratios) when I have time and I’ll post pics then. Last year I purchased Vinyl Renu for my own house and I’m completely satisfied with it, but trying to up sale that product is difficult since it’s so expensive. So, I’m thinking if this works, and I can build a designated pump/sprayer for method of delivery, I may offer this as a vinyl restoration up sale, but I have some concerns about F-13 at that strength around plants, windows, light fixtures and what not. Thoughts and opinions are greatly appreciated.

Thanks Russ and Ron. Can you recommend a brand?

Sorry, I thought I had already taken care of the signature.

I have a customer with a 400ft concrete driveway. The edges and borders are stamped concrete with the pigment/glaze finish, the rest is natural concrete finished. The client uses a farm tractor to clear snow from the driveway, and the big cleated tires always leave some pretty good black marks where the tractor makes turns. As for the squares of natural concrete I haven't had many problems removing those with just hot water. The stamped edges are what give me a fit! I've never been able to get rid of those completely with out harming the glazed finish. Its almost time to do this job again, so can anyone suggest a product to remove tire marks without harming the stamped finish? Thanks.