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Old 03-26-2011, 06:00 PM
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Spraying flat clear need advice

So I am spraying five star flat clear with medium hardener I sprayed it just like how I was told and it's really rough and nasty to the touch I was told to spray it like base coat to get it to be true flat clear and if I spray it wet it will stay shinny I am spraying it out of a lph 400 I'm waiting 20 mins between coats and it dose not have to be the smoothest thing in the world but it have to feel good to the touch can anyone tell me what I did wrong and how I can fix it this was my second time with flat clear and last time I sprayed a flat clear I was able to put it on wet. Oh ya I'm spraying between 15-20 psi

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Old 03-26-2011, 06:31 PM
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Quote:
Originally Posted by Aboven
So I am spraying five star flat clear with medium hardener I sprayed it just like how I was told and it's really rough and nasty to the touch I was told to spray it like base coat to get it to be true flat clear and if I spray it wet it will stay shinny I am spraying it out of a lph 400 I'm waiting 20 mins between coats and it dose not have to be the smoothest thing in the world but it have to feel good to the touch can anyone tell me what I did wrong and how I can fix it this was my second time with flat clear and last time I sprayed a flat clear I was able to put it on wet. Oh ya I'm spraying between 15-20 psi
Is this the one? http://www.5starautobodyproducts.com...coats/5165.htm

it shows a higher psi
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Old 03-26-2011, 07:26 PM
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Crank up the PSI, you are not atomizing it properly. Clear is generally thicker than base and requires a higher PSI to spray properly.

P.S. flat clear usually has a flattening agent added to it, how you spray it has nothing to do with it being clear or flat.

Vince
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Old 03-26-2011, 07:28 PM
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Ya that's the stuff my boss want a really flat no shine at all and I am just not sure this is the product for him or for this project
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Old 03-26-2011, 07:31 PM
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Quote:
Originally Posted by 302 Z28
Crank up the PSI, you are not atomizing it properly. Clear is generally thicker than base and requires a higher PSI to spray properly.

P.S. flat clear usually has a flattening agent added to it, how you spray it has nothing to do with it being clear or flat.

Vince
On there site it said 6-10 psi and I have never had a problem spraying clear in my life and the problem is getting it not to shine at all
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Old 03-26-2011, 08:57 PM
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The clear is designed to be flat when cured. Jack your inlet pressure up to 45-50 psi and adjust your spray accordingly. Lay it on like you would any clear, after it cures it will be flat. Your laying it on with too low of an air pressure which is giving you the rough look.

Vince
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Old 03-26-2011, 09:00 PM
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In a hvlp gun like my iwatta lph400
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Old 03-26-2011, 09:03 PM
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The 6-10 psi that they talk about is at the air cap of the gun, that is not the inlet pressure. The air pressure at the air cap is internally regulated on an HVLP gun. There is no way you can spray that stuff setting the inlet pressure at 6-10 psi.

Vince
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Old 03-26-2011, 09:22 PM
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That is right about the low pressure at 20 on my gun it comes out 10 at the cap is what I was told I just can see setting my gun at 40-50 psi that just seems like too much
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Old 03-26-2011, 11:16 PM
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Is there something to adjust the viscosity , like a reducer?

It also calls for the viscosity to be about the same as water around 17-19 seconds in a Zahn #2 ... water is 17 seconds so that's how thin it should be when mixed (RTS)

It will take a few days for it to flatten but it will... but it does go on wet to get level ...Carfully not to go deep sand the rough area with 1000 and recoat with the higher air or get closer to the panel ..you could try a test panel like a coffee can first

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