Auto Clear over Wood Paint? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 15 Old 10-25-2013, 08:50 PM Thread Starter
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Auto Clear over Wood Paint?

Can I spray Automotive Clearcoat over latex or any other common interior wood paint?


I can use auto paint on my wood projects if I have to, but I am trying to spare my wallet and my sanity.
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post #2 of 15 Old 10-25-2013, 08:59 PM
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You can do it however it is a gamble whether you create problems later. The automotive clearcoat is formulated to use on steel or fiberglass and if you happen to get a brand that is very hard it may crack from wood expansion. Wood finishes are formulated to be more elastic to allow for wood expansion. I don't use automotive clearcoats on wood so I couldn't recommend a brand that would work for you.
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post #3 of 15 Old 10-25-2013, 09:03 PM
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flex agent...

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post #4 of 15 Old 10-25-2013, 09:10 PM Thread Starter
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Quote:
Originally Posted by Steve Neul View Post
You can do it however it is a gamble whether you create problems later. The automotive clearcoat is formulated to use on steel or fiberglass and if you happen to get a brand that is very hard it may crack from wood expansion. Wood finishes are formulated to be more elastic to allow for wood expansion. I don't use automotive clearcoats on wood so I couldn't recommend a brand that would work for you.

I'm using MDF, and I will prime the inside and the outside of the box.

I assume it will have basically no expansion?
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post #5 of 15 Old 10-25-2013, 09:12 PM Thread Starter
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Originally Posted by OnealWoodworking View Post
flex agent...

I'm googling that, it's interesting.

My main concern is that some people have said auto clear will cause latex to 'bubble,' but I did not count the results as reliable.

Any idea?
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post #6 of 15 Old 10-25-2013, 09:56 PM
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Expansion is minimal with MDF but another problem is moister content - metal doesn't have to deal with this issue, but wood does. I would not recommend it but it's not a subject I know a lot about.

Its' never hot or cold in New Hampshire... its' always seasonal.
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post #7 of 15 Old 10-26-2013, 05:39 AM
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Can you?Yes,you can spray it on there.....will it perform the task,now that's a good question.

I wouldn't do it for a bunch of reasons....but then that may not have a bloomin thing to do with you.If you want to test it on the cheap......paint a sample bd,make it 12x12 inches or so with your latex.Take it down to an auto collision repair shop and wave a 5$ bill for the guy who'll spray it the next time he's spraying some clear.....which is an everyday thing for them.

Just tell him you were curious?Wanted to see what happens.

Then,and this is just me....I'd throw the test sample out behind the shop for a few weeks.Even if the project is intended for indoor use,would still throw it outside......whatever is going to happen to it,will happen faster.

Those who say it cannot be done shouldn't interrupt the people doing it.
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post #8 of 15 Old 10-26-2013, 11:49 AM
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It depends on what type of clear you use and how it might effect the latex. Quite a few auto clears can be used on wood. Hopefully you have NIOSH training, since some isocyanurate catalyzed clears can kill you if you breathe any in. They react with water and will freeze your lungs, permanently. House of Kolor Kosmic clear is an option if you want high gloss.
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post #9 of 15 Old 10-26-2013, 02:43 PM Thread Starter
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Thanks, gents.

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Originally Posted by Hammer1 View Post
It depends on what type of clear you use and how it might effect the latex. Quite a few auto clears can be used on wood. Hopefully you have NIOSH training, since some isocyanurate catalyzed clears can kill you if you breathe any in. They react with water and will freeze your lungs, permanently. House of Kolor Kosmic clear is an option if you want high gloss.

No training, but I sprayed my car for repair when it was totaled. I used a dual cartridge respirator. (It has vapor cartridges)

Last edited by icor1031; 10-26-2013 at 02:48 PM.
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post #10 of 15 Old 10-26-2013, 06:13 PM
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The only safe approach is to test it yourself on the finishes you plan to use. All finish formulators are changing their products to meet ever changing VOC regulations. Years ago, I attempted to spray lacquer based auto clear coat over a "latex" enamel and it completely softened and wrinkled both products.

Howie..........
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post #11 of 15 Old 10-27-2013, 08:28 AM
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Icor: I would recommend you try SPI, Southern Polyurethanes Inc, universal clear coat.It stay flexable and is a great product. They have a web site and you can order from them direct. It is all I use on my street rods and cars and I have used it for outdoor projects with great results.
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post #12 of 15 Old 10-27-2013, 08:33 AM
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flex agent...

??????????????

G
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post #13 of 15 Old 10-27-2013, 09:16 AM
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automotive paint additive

This additive is used on facsias and bumpers to prevent cracking when the flexible plastic parts get bumped in the parking lot. I have used it on interior door panel and fascias.

Personally, I would not use it on wood, but I could be wrong.
If it does work, it would be a great solution to wood movement when finishing with auto clear coats.

search the term:
http://www.saturnfans.com/forums/sho...d.php?t=156358

http://www.ebay.com/itm/AUTO-PAINT-F...-/390402989487

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 10-27-2013 at 09:20 AM.
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post #14 of 15 Old 10-28-2013, 12:12 AM
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I'm using MDF, and I will prime the inside and the outside of the box.

I assume it will have basically no expansion?
There would be less wood movement with MDF but it won't be eliminated. It's one of those things you will have to try it and see. Unless someone here has first hand experience with a particular product they could recommend I still think it's a gamble.
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post #15 of 15 Old 10-28-2013, 08:56 AM
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Major thumbs up for SPI.......mentioned above.

In this day N age of BS service and declining product quality/value......the folks at SPI are a very fresh breath of air(ha).

Those who say it cannot be done shouldn't interrupt the people doing it.
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