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Old 02-05-2007, 12:09 PM
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Need Help Spraying Metallic

I cant seem to spray this paint consistently. It is a Nason single stage Ful Thane paint. It is basically a pewter color. I think that if I would have done it BC/CC I would have been better. I am looking for some spraying advice on this.

The probelm is in order to get enough paint to make it flow and shine I sometimes end up with a large streak. it was especially bad on a flat surface. I am spraying with a Devillbiss Finishline 3 HVLP gun with 1.3 tip. I have tried lowering pressure and increasing. Higher pressure seemed better. It also seemed to help to increase the fluid and move relatively fast. If I open up the fan too much I end up with dry streaks next to my spray.

I know that this is not the easiest color to spray single stage, but I would like to be able to do it. Any gun set up questions? Maybe a different gun? This gun sprays clear and solid color single stage great.

Thanks,

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Old 02-05-2007, 03:52 PM
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First get your gun spraying the best you can and use a good overlap, keeping th e gun parallel. Get a good wet coat on a panel, but don't hose it on. The wetter you spray the more likely to streak. If you are getting a little mottling or streaking, Spray a wet coat on a panel and move to the next, leaving the first panel set up a little bit, but not dry. When you get done spraying the second panel go back to the prior one and spray a little dryer coat further away at angles and increase the pressure a little if needed. This is known as a mist coat or drop coat. If it is set up a little but still wet enough, you should be able to even out the metallic as well as keep a good gloss. Single stage is harder to spray metallics in because you need to both keep a good glossy smooth coat, and also get the metallic even. Pewter which is a silver will be one of the more tougher colors to spray metallic, and add to that you are using a lower cost paint which may not have as good of metallic control as a better one. Make sure you are not using too fast of a reducer or too low pressure/ heavy of coats. The most important coat will be your last one. If you have a little bit of mottling in any of your coats but your last, you should be able to even it out in the last. Unless the paint is really poor covering and you really have pretty bad streaks. Over reducing you last coat of paint just a tad may help with spraying the metallic even also. Your gonna half to spray it as good as you can. If you get a run the metallic might pool and also you won't be able to wetsand and buff out runs or any dirt specs, flaws, as you can disturb the metallic and make it blotchy. The base/clears are easier to spray metallics in, just one of the reasons they are what is mainly being sprayed today. I also think your tip size may be just a tad small for single stage metallic, (assuming your not using a pressure pot setup) but haven't used the finishline. You could try reducing a tad more, and the tip may spray it better.
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Old 02-05-2007, 07:01 PM
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You have some great advice from Ken but your fighting a losing battle.
First problem is your shooting Nason Metallic,Second is it's Nason Single stage Metallic. Your trying to shoot it thru a 1.3 HVLP and that is even tougher.
Your going to have to crank the air up some as you noticed.Get a good test pattern/atomization and go slow with consistant overlap of 60-75%.
You'd be better off with a conventional gun for this "paint",A 1.4 for your D' would help.
Nason metallics are tough in base coat let alone a SS. I would have gone with Chroma's series. Much better paint and metallic flow out.
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Old 02-05-2007, 08:14 PM
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It's all about gun setup, product temperature selection, spray technique, and timing. You basically want to cover the car with enough paint with smooth coats untill full hiding is achieved then before the last coat has tacked up do a drop coat or mist coat to even out the metalics. The drop coat will flow into the previous coats and be smooth and shiney if the timing is right and the products are right for the temperature. Singlestage metalics are the toughest to spray.
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Old 02-27-2007, 01:01 PM
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I don't want to hijack this thread but is it possible to drop coat over a cured clear coated single stage? I have some stripes in the single stage metallic but have already sprayed clear over it. If I spray another coat over the scuffed up clear will it cause the color to darken in the striped areas??
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Old 02-27-2007, 07:39 PM
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If you've got clear on it you'll need to start the paint process over, scuff or sand the clear, shoot one medium wet coat then do the drop coat. If you try to do a drop coat without having a wet coat below the paint will look like dry spray-you need to have a smooth medium wet coat already on for it to accept the drop coat and blend togther-hope this makes sense. Timing is key here-if the drop coat process is rushed the metalics will mottle and sink, if it is done to late the drop coat won't melt into the previous coat and it'll look dry. Single stage metalics are the toughest paints to shoot IMO.
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Old 02-28-2007, 01:18 AM
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Will it still get the dry spray effect if I plan on going over it with clear quickly afterward. I am guessing that it might look like overspray trapped between coats of clear, which is not what I am going for but still I dread a complete respray of the cab. I am somewhat afraid the color is going to get too dark, more toward the reddish hue as I build more coats up. It is a metallic orange.
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Old 02-28-2007, 05:52 PM
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You can bury quite a bit with enough clear, and even if it is a bit dry and rough, you probably won't really notice after clear. But the problem is you Could have adhesion problems of the clear to the base if you go too dry on the base. I'd do like bob suggested and spray another fairly wet coat of paint and then up your pressure a little and back off gun distance and do you drop coat soon after while it still has a chance to settle in the prior medium wet coat. Then give it plenty of flash time before reclearing.
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