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Tractor Painting Problems?? not smooth


 
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t.r.y.
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PostPosted: Tue Mar 06, 2007 12:26 pm    Post subject: Tractor Painting Problems?? not smooth Reply to specific post Reply with quote

I Have both a hvlp and a gravity feed guns with 1.8 needles, trying to paint enamel on some old tractors and can't get it smooth. I run around 40- 50 psi with water seperater. I just can't seem to get it to flow right. anyhelp would be appreciated. thanks

 
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CNKS
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PostPosted: Tue Mar 06, 2007 1:33 pm    Post subject: Re: Tractor Painting Problems?? not smooth Reply to specific post Reply with quote

The tip for HVLP topcoats should be 1.3-1.6 -- preferably 1.3 or 1.4. 1.8 is a fire hose. Make sure you are not exceeding the pressure that should be marked on the gun. Depending on the gun the max pressure could be from a low of about 30 to a high of about 50. Fluid set at about 1/4 turn from wide open with the trigger pulled. Pattern about 1/4 turn from wide open also. Otherwise, you have the wrong paint ratio, gun too close, too far, etc.

 
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circus
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PostPosted: Wed Mar 07, 2007 6:40 am    Post subject: Slower reducer Reply to specific post Reply with quote

Smaller tip for even metalic, slower thinner for
flow. Is primer smooth?

 
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souNdguy
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PostPosted: Wed Mar 07, 2007 7:32 am    Post subject: Re: Tractor Painting Problems?? not smooth Reply to specific post Reply with quote

So what's it doing.. running.. coming out thin? what? bad coverage pattern?

Soundguy

 

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glennster
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PostPosted: Wed Mar 07, 2007 10:14 am    Post subject: Re: Tractor Painting Problems?? not smooth Reply to specific post Reply with quote

what kind of enamel is it? alkyd or an automotive type?

 
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B-maniac
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PostPosted: Wed Mar 07, 2007 5:16 pm    Post subject: Re: Tractor Painting Problems?? not smooth Reply to specific post Reply with quote

If you are using the correct (slow drying) reducer , it don't matter what needle or air cap or air pressure , the paint will flow out smooth. (assuming the prep work was smooth to start with) If you are using quick drying reducer to ward off excess dirt in paint like most do , then the spray equipment and spray style definately comes into play. Slow dry reducer can be your friend but you have to be able to anticipate flow out to avoid runs. Spray test panels first.

 
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Joe(TX)
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PostPosted: Mon Mar 12, 2007 3:45 am    Post subject: Re: Tractor Painting Problems?? not smooth Reply to specific post Reply with quote

If you are getting orange peel, It could be from too much air pressure, holding the gun too close, too hot a reducer or too thick material.

 
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