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Old 02-07-2006, 11:27 AM
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Clear Coat

I'm getting ready to shoot clear coat. I'm having a hard time getting my garage heated up. I'm in the desert, so humidity is about 11 percent. The outside temp is about 46 right now and my garage is at about 60 degrees. I hate to rush a job like this, but I need to "git 'er dun". Any thoughts on the minimum temp for this?
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Old 02-07-2006, 11:29 AM
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You need at least 60 degrees for urethane to cure properly, and
at that it will be very slow and take a lot of time.
And remember, steel panels generally are 10 degrees cooler than the
air temp.
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Old 02-07-2006, 11:35 AM
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Clear coat

Forgot to add the imortant parts.....I'm using nason 497-00 SelectClear, with 483-79 high temp reducer. I like to use high temp reducer in a colder inviroment to let the paint have more time to flow. Seems to work pretty good.
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Old 02-07-2006, 11:39 AM
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60 degrees

Thanks for that reply...........I'm not clear on if that means I need a 70 degree shop temp, factoring in the 10 degree metal temp.?
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Old 02-07-2006, 12:55 PM
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If you can get a thermometer that will measure the metal temp that would be good...Painting in cold weather can be a PITA..and yes NM can be cold..Nearly froze there one year..Dunno if they have a polar accelerator for Nason but you may wish to ask..??

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Old 02-07-2006, 04:00 PM
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I am not a paint expert by any means, but I would think that you will have real problems trying to put more than one coat on it at those temps. Using a high temp reducer will make it even worse, in my opinion. I would think you would be lucky if you only ended up with solvent pop.
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Old 02-07-2006, 07:12 PM
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Using the 497 with the mid temp cat would be MUCH better for YOUR situation. I shoot a lot of 497 and with an average shop temp of 65-70 it's still flows great. The high temp cat will really make it stay open too long IMO and be much more subject to solvent pop and trash issues. It's going to be around 30-45 min minimum flash per coat at that temp,probbly longer,so don't get in ANY hurry to lay the next coat. If you can,shoot a test panel along with the job and use it to touch test on.
497 is a very forgiving clear,one reason I use it besides cheap, BUT, it will pop or in most cases,crater on you IF you don't let it flash off GOOD before the next coat. I've learned this the hard way so I let if go longer than I "think" it should and had MUCH less pop or cratering.

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Old 02-08-2006, 07:25 AM
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OK, Now for my "Claim to Fame" response, Don't laugh to hard please.
If you get your car or panel painted, and it's set up long enough to
be safe to handle (like a day or two) cover the panel with an
"electric blanket" and set the temp to keep the panel very warm,
(not "burnt")You can leave it on for 24 hrs and it will harden it up nicely.
Everybody laughs at me on this one, but hey, it works.
You can keep the panel at 100 degreees without trying to heat the room.
Use a thermometer under the blanket and monitor its temp.
I'm proud of this one, LOL
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Old 02-08-2006, 07:33 AM
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Thanks again guys!

It was about 55 when I put the clearcoat to it. I didn't have a problem waiting the extra time between coats. Learned the value of that one a while back.

Anyway, it came out really nice! I wish I cold post a picture, but I'm have comp/camera problems right now We've talked a lot about "garage painting" and there's nothing easy about getting a black clearcoat finish the way you want it. I'm pretty pleased with this one.

Thanks again
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