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Old 06-27-2015, 12:14 AM   #21
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They use Ceramic on Bike Exhaust to not burn you... I could only imagine how suspending ceramic in paint also provides a superior heat barrier~
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Old 06-27-2015, 12:23 PM   #22
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Quote:
Originally Posted by USMCRockinRV View Post
They use Ceramic on Bike Exhaust to not burn you... I could only imagine how suspending ceramic in paint also provides a superior heat barrier~
If you had 95% ceramic in the paint like those exhaust coatings then, yes, it could plausibly make an improvement. Note that they don't use ceramic beads, though. From my understanding, they are typically made from ceramic dust + binding agents, etc.. Lizardskin makes a ceramic coating that goes on thick. Thickness is probably the biggest player in this insulated paint debate. Of course, real insulation always wins out.

I have no experience with that type of coating, though. I've only tested HyTech's product and it was lackluster. If you've read the thread I posted earlier you will see that the results were disappointing.
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Old 06-27-2015, 03:45 PM   #23
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all this debate on painting the roof... and it's only going to serve one purpose

personally, I'd lean toward putting up an almuminuminumnumum framed deck floating 2 inches above the highest part of the roof, insulate it with layers of 1/2" plywood*, 1" double foiled insulated foam board, refletix, with a 3/4" layer of plywood on top, with aluminum cross bracing, weld stake pockets on the main aluminum frame, with stakes for a removable canopy with sun shade fabric... or make a screened porch for catching the breezes, when the weather is nice.

and turn that deck into dual purpose, like the upper deck of houseboats, with airflow under the deck.

Start the aluminum frame just behind the driver's cabin, and put solar panels above the driver's cabin, on tilting frames you can tilt them from the upper deck. Lay flat during transport, and tilt when you're on location.

a short 3' - 4' rear deck mounted to back of bus for a staircase /or\ ladder on one side, and opposite side of deck for the lower part of a mini-split A/C unit with dual zones for the back half and front half of bus.

paint it all you want, but you're not going to be walking around on top of it much!

*you could even use expanded steel for the underside of deck, if you prepare it for electrolysis because of differing metals.


edit:
as soon as I posted this comment... the images that refresh at the top of the page showed this?

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Old 06-27-2015, 04:22 PM   #24
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Since we're on the subject of elastomeric paint has anyone applied it right over metal that was treated with ospho with out primer afterwards?
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Old 06-27-2015, 04:27 PM   #25
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Poll: elastomeric vs. white paint on roof

That's cool... I think the best practice and I saw this when I drove onto the Branch Davidian Property (true story)... Is to bury the Bus 5' underground - it blocks out most of the sun...
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Old 06-27-2015, 04:46 PM   #26
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Was that before or after the weenie roast??
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Old 06-27-2015, 05:09 PM   #27
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Quote:
Originally Posted by allwthrrider View Post
Since we're on the subject of elastomeric paint has anyone applied it right over metal that was treated with ospho with out primer afterwards?
If I recall correctly, Ospho specifically warns it is not primer.
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Old 06-27-2015, 06:08 PM   #28
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If I recall correctly, Ospho specifically warns it is not primer.
It just says treat, let dry overnight then paint, no mention of priming.
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Old 06-27-2015, 06:16 PM   #29
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I just went out to the shop to read the bottle. What I was recalling was that it warns it is not a *paint*. So... I have no idea on if primer is required or not. I put on a primer coat when I did my floor.
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Old 06-27-2015, 06:30 PM   #30
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That deck would be nice, but with a lil' 360 engine we're already gonna have enough weight to pull up a hill. Plus paint is cheaper. Plus I've heard roof decks make it waaaay harder to insure.
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