Nason SS urethane black won't dull with flattening compound - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-16-2011, 10:38 AM
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Nason SS urethane black won't dull with flattening compound

What the heck? My paint supplier has no answer on this, I've mixed an ounce of flattener from my paint guy's mixing bank for the Nason with four ounces of black mixed from the same bank, it still looks like a mirror, should the shine die out a while after spraying or what? We're trying for a black between gloss and matte. They can't find a mix for something in that range so we're experimenting with the flattener. My paint supplier says four ounces of the flattener I'm using is enough to make a quart of gloss black into a flat black like on 60's Mopar hoods.

Thanks,
Chip.

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Old 04-16-2011, 11:22 AM
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Not familiar with solid or core resin of Nason but.

I would guess you need to be 30-35% by volume of flattening agent to get what you might call a low sheen or semi gloss..

Also each coat must flash good or you can over ride the flattening agent, like you never put it in.

The flatness will not be true until the solvents are out, so usually in say an hour you might be at 70% of what it will end up being DEPENDING on speed of activator and or reducer and coats applied.
True results are always looked at after setting overnight for testing.

Also flattening agents themselves come with different types of flattener's and strengths.
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Old 04-16-2011, 11:26 AM
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I'm doing the same thing with nason black ss although I haven't gotten around to it. I've used Dupont 4531s flattener in nason clear over black and it worked but it seemed like it took alot. I also used it in nason clear on some wood graining and it worked, you might not want to spray it really wet.

I will be doing some spray outs with the nason ss black and the 4531s and will let you know what iI find.
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Old 04-16-2011, 09:33 PM
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Barry, thanks for the education once again on another product and it isn't even one of yours. YOU'RE THE MAN!!!!!

Thanks Yeepman, the car owner decided to order a House of Color kit today at the suggestion of the paint salesman since this stuff isn't cutting the mustard. He was just going to get the Dupont brasserie in a can 4531S flop control/flattening agent but the salesman pushed the HOK stuff, it'll be in Wednesday.
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Old 04-16-2011, 10:02 PM
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I found that it takes so much flattener I didn't fell comfortable with it and will never try to flatten a urethane SS again. They will seldom have an even flatness over the whole thing.

Shoot it a bc/cc with a "Matte clear" and you will have a totally uniform flatness, it is the only way to go.

Brian
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Old 04-17-2011, 03:49 AM
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Quote:
Originally Posted by MARTINSR
I found that it takes so much flattener I didn't fell comfortable with it and will never try to flatten a urethane SS again. They will seldom have an even flatness over the whole thing.

Shoot it a bc/cc with a "Matte clear" and you will have a totally uniform flatness, it is the only way to go.

Brian
------------------------------

I could not agree more, I tell people every week, I'm not a good enough painter to pull it off on an all over job.

Yes, doing a bumper size project is no problem but just doing the overlap in the center of the hood can leave a shinny stripe down the middle, if not done perfect.

I have seen as high as 50% flattener to totally kill the gloss and that is at the breaking point where you are starting to fight white specks in ans SS.
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Old 04-17-2011, 06:56 AM
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Depending on conditions flat clears and additives can take a week to look right..

patience, it might change so let it set a while
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Old 04-18-2011, 09:06 AM
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It took a full day for it to get a flat finish and that was too dull. We're gonna try the HOK stuff so we can hopefully get the semi gloss sheen to it.
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Old 04-19-2011, 11:34 AM
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Question: What material exactly is flattener? If your mix is 30% to 50% flattener, that's a lot! So, is it solvent, pigment, what???

Russ
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Old 04-19-2011, 01:29 PM
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pre-formulated flat/mat clears are SOOOOOOOOO much easier on bigger jobs and all overs. all you do is mix and go. you can adjust the flatness by how many coats and reducer, again so much easier than a flattening ratio with an additive.

i've done a few with sikkens mat clear with no problems, now give me a 2 component system where i have to mix some single stage and flattener in it and i cant do it twice the same way to save my life. not so much a big deal on small parts and firewalls and such.....but like said above getting into all overs is a tough task.....ESPECIALLY in the summer.
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Old 04-19-2011, 02:05 PM
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The stuff that ain't taped is gonna be some form of not shiny black.



The rest of the car is 2009 BMW Sedonarot in Spies 295 base, red pearl mixed in the first coat of SPI Universal clear and then two more coats of Universal clear.
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Old 04-19-2011, 02:20 PM
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I too had problems with flattening a SS urethane. I talked with the PPG rep and he advised me to use as little reducer as possible seems the more you add the more the shine .. thought it was weird but this is how it turned with about 35% flattener and just enough reducer to spray it

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Old 04-27-2011, 07:31 AM
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Here's the final result. Once I took a little more time to play with percentages of flattening compound, we got what the owner wanted. We even faded it a bit at the end of each stripe on the door.




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