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Admittedly, this is a Harbor Freight gun, but I have some problems in using it. The gun is a pressure feed model. Instructions? Like they come with a Harbor freight gun.

I actually bought this gun to spray laquer and shellac for wookworking and it dos good for that job.

Spraying PPG DP40LF primer I have some problems. Its probably technique and maintainance, but I could use some help.

Firstly the gun is leaking air around the horn with the trigger off. What causes this.

Secondly, the gun drips paint from the horn, dripping on my paint job. What causes this.

Thirdly, the gun sputters a bit, giving a poor finish.

Fourthly, how do you paint upside down? With pressure, siphon or gravity feed, it doesn't seem possible. I guess that a separate pot would work.

Now, I was just spraying the trunk after replacing the quarter panels, so the finish isn't that important and I'm sure that the results I have now are OK.

I am planning on going ahead and putting on BC/CC in the trunk so that I can putthe gas tank back in. I would use this gun if I can, else I'll have to wait to geta new gun.

IfI need a better gun, what should I get that can spray primer and also BC/CC the jambs to save on the final paint job. Not sure that I would do the final paint, but it would be nice if the gun could do that. I don't think I need one ofthe very expensive guns. Should I get gravity feed, siphon feed, pressure feed.
 

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Check the gun and make sure that all the seals are intact, that everything is tight. You shouldn't have any air leaks! Sounds like a bad seal, To paint upside down you need a seperate pot or a gravity feed with the paint in an enclosed bag. If you can't get this gun to spray correctly save it for staining wood and invest in a "quality" gun, You'll be happy that you did!
 

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If you planning on doing anymore painting in the future it is for sure with the extra money to get a high quality gun. I would suggest the HVLP gravity feed gun. Like the other poster said use the bags, you can paint upside down, you have very little wasted paint and clean up takes about 2 min.
 
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Well, I disasembled and cleaned my gun. After getting all the parts out so I could see how it worked, I think I was using the fluid control backwards.

Also, I'm notsure I had enough pressure at the air cap. You need 10 psi at the cap for HVLP. Using 40 psi supply pressure, I could only get about 4 psi. At 60 psi, I can get 10 psi at the tip.

We will shootthe BC/CC in the trunk tomorow and see whether I toss the gun or keep it.

I found out today that the Navy base I work at has a paint booth and a sharpe HVLP gun (3 of them). Obviously a better gun than I am using now. So I now have a new resource. I might decide to paint the entire car myself now. I was going to only do the jambs and hidden areas prior to a pro finishing the job.

I also found out that I have many choices for the clear coat. Anyone have recommendation for their favorite PPG clearcoat?
 
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