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Old 04-19-2018, 12:41 PM   #1
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Default ceiling covered in diesel smoke damage

I have a shop to paint and the ceiling is covered in diesel soot and smoke damage from running trucks inside it the ceiling is particle board, what is the best primer to use that will cover and stick and what is the best way to prep this ceiling?
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Old 04-19-2018, 12:53 PM   #2
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How thick is it? If it is just staining from the smoke then a coat of a shellac based primer, maybe two, should suffice. If there are actual deposits of soot present, then washing the surfaces down first with something like Krud Kutter will be necessary prior to priming.
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Old 04-19-2018, 04:35 PM   #3
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I had some kerosene soot on my ceiling years ago. We had to clean as much off as we could and prime with BIN. It's really the only thing i would recommend.
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Old 04-20-2018, 07:25 AM   #4
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Ugh. Better you than me. Can you power wash it in there? I'm thinking hot water pressure wash like you're washing a bulldozer.
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Old 04-20-2018, 07:26 AM   #5
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Oh, maybe not on particle board...
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Old 04-20-2018, 11:12 AM   #6
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I remember we used a LOT of 409. Wiped out three stores' stock. This was before there was a Walmart nearby though.
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Old 04-20-2018, 08:58 PM   #7
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Definitely need some sort of paint friendly degreaser (diesel is oily, the soot is as well). Definitely bin or an alykd primer designed for locking down the surface. I never painted over diesel soot personally but have cleaned the backside of my old diesel truck and my diesel golf I used to own.

Bin is the go to for fire restoration work so id be leaning towards that.
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Old 04-21-2018, 10:29 AM   #8
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Quote:
Originally Posted by Brilliant_Painting View Post
I have a shop to paint and the ceiling is covered in diesel soot and smoke damage from running trucks inside it the ceiling is particle board, what is the best primer to use that will cover and stick and what is the best way to prep this ceiling?
Of course, a best practice would involve removing whatever contaminant is on the surface. In this case, diesel fuel related residue. But, I also would consider the environment a new paint job will be performing in, and what measures will be taken to maintain the new coating.

If the surface is difficult to access, prevented from using a degreaser and pressure washing because of the sensitivity of the surrounding areas, and will continue to be subjected to diesel exhaust without any measures to maintain it, I would likely go with an oil base primer, followed with an oil based finish coat. Even a 100% acrylic DTM finish would be enough if cleaning maintenance is not a concern.

I also like the single component oil base primer because it "wets" the surface better than other coatings and is more tolerant and compatible on an oily (diesel) surface that can't receive an ideal preparation.
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Old 04-24-2018, 11:22 PM   #9
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I havn't seen it but im told its particle board so i don't think i'll be able to wash it and this farmer's shop is a few decades old
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Old 04-24-2018, 11:23 PM   #10
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what is 409?
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Old 04-25-2018, 08:51 AM   #11
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Quote:
Originally Posted by Brilliant_Painting View Post
what is 409?
It’s an all purpose household spray cleaner similar to Krud Kutter.
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Old 04-25-2018, 08:58 AM   #12
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Don’t over think this job - it’s particle board in a farmer’s shop. Clean it the best you can. Prime it well with something designed to block stains, then top coat. As soon as he starts up another piece odor equipment inside it, smoke soot is going to start accumulating again.
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