Smoke damage on aluminum from fire pit

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Any ideas on this guys? They had a fire pit on the patio that destroyed the roof of the patio. Tried a 3% mix of sh with no luck.

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Dealt with this exact thing recently. I did a small test section with EBC and it did the trick. If you don’t have EBC, another degreaser will probably work. Do a small, discrete test section to make sure it doesn’t have any adverse effects though. Dilute it and make stronger if necessary.

Edit: What is the deal with people who think putting a fire pit under vinyl or aluminum is in any way a good idea? lol

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Thanks man I’ll get some ebc and try that. Concrete is pretty bad also underneath may try it there as well.

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Yep, hydroxide based degreasers will corrode aluminum. I thankfully discovered that on some squeegee channels I left in my bucket. Otherwise it could have been an expensive mistake.

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Good to know! The area that I had to use it on was all vinyl from where they’d had a fire pit underneath it. It definitely pays off to test small, hidden areas before doing something that may screw you big time.

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@Mr_G I owe ya a cold one thanks for the advice on this. Turned out better than the customer and I both imagined

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Looks good! Did you downstream or direct apply?

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Thanks! This was done with a pump sprayer. I sprayed a 5x10 section hit with a brush lightly then rinsed right away. Each section was done in about 5 minutes so dwell time is 3 minutes max

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Thanks for the info!

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Glad it worked out for you! Results look great. Bet the homeowner was well pleased!