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Old 08-05-2021, 10:25 PM   #1
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Filling in perforated roof holes

I wanted to cover all the little tiny roof holes in my bus because it CONSTANTLY rains a nice coating of black on everything.
I have read threads about either filling in or covering up the holes in the roof. From what I read, I decided to primer over the holes and then paint. I use this bus for tailgating in Cleveland and wanted this to last the life of the bus. I decided to use Zinsser Cover-Stain oil based primer and then Rustoleum Implement Enamel. From what I read, a single coat of primer should cover the holes... I just finished my second coat and third gallon of primer and only about 30% of the holes are filled in. I have tried multiple different types of rollers and brushes, nothing seems to fill them better. Any ideas on how I can fill these holes better or maybe thicken the primer?

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Old 08-05-2021, 11:29 PM   #2
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Try one of the Durabak smooth (not the textured) products. They have some good colors and the stuff makes a nice finish...and it's thick enough to cover those holes.
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Old 08-06-2021, 02:15 AM   #3
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I forgot to mention I also need it to be gloss for the lighting, do they offer a gloss and will it be fine going over the cover-stain primer?
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Old 08-06-2021, 06:35 AM   #4
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Do you mean tiny holes in the ceiling rather than in the roof? If you're talking about the perforated headliner (the steel sheet attached to the inside of the ribs) I don't think any variety of paint is going to fill those in.
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Old 08-06-2021, 10:52 AM   #5
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Yes, my bad, I mean ceiling or interior roof, lol.
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Old 08-16-2021, 09:08 PM   #6
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No other ideas on what to use to clog these things up?
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Old 08-16-2021, 09:26 PM   #7
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You could try peel-and-stick wallpaper from one of the big box stores. No idea how long that would stay up, though.
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Old 08-17-2021, 05:53 AM   #8
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This is an option but I would wonder what the black stuff might be. http://https://www.homedepot.com/p/Z...0924/203317264.
You also could take the ceiling down and close them up from the top side.
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Old 08-17-2021, 09:19 AM   #9
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Sherwin Williams sells Pro-Block latex primer, if rolled on would likely fill the holes it's pretty thick. Would require a finish coat in latex though.
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Old 08-17-2021, 09:24 AM   #10
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I think all the liquid options would be a mess unless you find something very sandable.

Vinyl Spackle?
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Old 08-17-2021, 09:32 AM   #11
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What about peel and stick tiles or those faux pressed tin panels. A little pricey.
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Old 08-17-2021, 10:10 AM   #12
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Quote:
Originally Posted by BamaBus View Post
This is an option but I would wonder what the black stuff might be. http://https://www.homedepot.com/p/Z...0924/203317264.
You also could take the ceiling down and close them up from the top side.
Link doesn't work but it was for Zinsser Peel Stop Triple Thick Primer
that can be found at various locations.
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Old 08-18-2021, 09:13 AM   #13
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I kept on looking at the triple thick primer at the store. What would be the most durable paint I can use on top of it? Could I still use an oil based enamel or would a alkyd enamel work better?
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Old 08-18-2021, 12:49 PM   #14
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The issue is condensation raining down inside. So the solution is to close that moisture into a cavity that has no ventilation to help evaporation on the condenstaion, resulting in rust build up over time.
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Old 08-18-2021, 04:12 PM   #15
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Not really too worried about that as the bus is damn near unusable now as everything gets absolutely disgusting after just a week.
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Old 08-18-2021, 04:39 PM   #16
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Not really too worried about that as the bus is damn near unusable now as everything gets absolutely disgusting after just a week.
It sounds like something pretty unusual is going on with your bus - like lots of mold or something inside the factory insulation. You might do well to remove your ceiling panels and the insulation.

It doesn't really make sense that you would be having anything coming out of those holes, though. The factory insulation is covered (or should have been covered) with a layer of cloth before the steel headliner panels went up, which should catch anything before it comes out of the holes. Your black dust might be coming from somewhere else entirely.
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Old 08-18-2021, 04:54 PM   #17
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The insulation is black because My dad lit the floor on fire when he was attempting to take the wheel chair lift out a few years ago. We cleaned everything but the soot from the burning rubber is still stuck in the insulation.
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Old 08-18-2021, 05:00 PM   #18
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The insulation is black because My dad lit the floor on fire when he was attempting to take the wheel chair lift out a few years ago. We cleaned everything but the soot from the burning rubber is still stuck in the insulation.
Aha! For health reasons, I would definitely gut the ceiling.
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Old 08-18-2021, 07:35 PM   #19
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At this point it is too much work to gut the ceiling. I only use this bus for tailgating so I spend maybe a total of 30 hours in there a year.
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Old 08-19-2021, 09:24 AM   #20
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Quote:
Originally Posted by knowpistons View Post
I kept on looking at the triple thick primer at the store. What would be the most durable paint I can use on top of it? Could I still use an oil based enamel or would a alkyd enamel work better?

Check the can for proper top coat. If you go with latex flat paint is the least durable, semi gloss is flexible and washable.
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