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Old 04-16-2009, 03:56 PM
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Paint Mixing

Hello
I have a questions pertaining to paint mixing.

1. when mixing paint to spray whether its primer, base, or clear how does one dictate how much to mix if just spray one coat, when using a gun with a 20oz cup. Is their a guide line for how much to mix when spraying a small, medium, and large automobile for example 14oz for small car per coat, etc. thanks for any help anyone can provide.

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Old 04-16-2009, 08:01 PM
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There are far too many variables to say what cup you should use per size of area. You control how much material is delivered with your gun. What I usually do is mix about what I think I need plus a little more. It's far better to have a little extra in your gun than to run out. With the extra that's left just go over some spots again.

Vince
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Old 04-16-2009, 08:34 PM
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I usually figure about a quart (32 oz) to a quart and a half mixed for a coat on the outside of a small to medium size car.

But like vince said too many variables to say for sure. Depends on how you paint, viscosity of material, efficiency of your gun (conventional blowing a lot of material in the air or a good hvlp) ect.

I am opposite. I tend to mix on the short side of what I think I'll need, specially with catalyzed material, figuring I can mix up a little more quickly if I need to. That way if something catasrophic happens in the middle of spraying (which has happened to me before) I am not sitting with a bunch of material mixed up. Then after your first coat, you can look at what you used and know better how much to mix for another coat.

You could try baddbobs suggestion too, if you have no idea. Fill your gun with water and spray the vehicle like you were painting it, to get a ballpark of how much you need. You will have to make sure its okay to spray the vehicle as well, ie if baremetal or plastic filler spots maybe not a good idea, or would need to dry and blow off soon with a blow gun. Plastic filler can soak up water and may not be the best thing if applied over baremetal. Also if fresh paint or primer, that its cured enough to be hit by water and won't water spot. But tryed it once when I was running low on clear and had a few panels to clear. I sprayed a coat of water on the panels and looked at what I used. Then times by 3 for 3 coats. Figured I'd be close but should have enough clear to finish the job. I was shocked at how close it came to the amount of clear I ended up using in my particular instance.

As far as how much material to do a whole car, thats really hard to say, base in particular. You can have a good base and be shooting a color that happens to cover well, an efficient gun, and only end up using 2 quarts to do a whole car (1 to 1 mix) jambs and all, or on the other hand something like omni and the color covers crappy, and burn through almost a gallon (2 gallons mixed).
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Old 04-17-2009, 11:23 PM
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that sounds like a great idea spraying with water, never thought of it, I'll do that tomorrow. thanks
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Old 04-18-2009, 07:27 AM
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after a while you get pretty good at gussing how much you will need
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