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Old 04-09-2012, 06:15 PM
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Spraying Base Coat Problem....

Hello
Everyone
I Need Help
Im Working With Nason Base Coat 3.5voc
Spray Gun Iwata Ls 400
Couple Ago I Sprayed A Red Color Kind Dark Without Problem

Now Im Working With A Simple White Color
When I Spray It ? It's Like Im Spraying Fume Or Fog ??? I Had This Problem Before With A Light Metalic Blue
It's Impossible To Get A Correct Pattern?????
Just For Covered A Hood ? That Take To Many Pass
The Mix Ratio Is 1:1


Im Waiting For Your Help Thanks

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Old 04-09-2012, 08:10 PM
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Did you check the pressure at the gun with the trigger fully open? The LS400 takes a lot of air, I have one and I always check that first.

regards

Ron
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Old 04-09-2012, 10:42 PM
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THANKS FOR THE REPLY
WITH THE TRIGGER FULL OPEN ? YOU MEAN THE MATERIEL VALVE FULL OPEN ?
I JUST TRY AND I HAVE AROUND 16PSI
I SET THE Bottom air adjustment all the way out , WITH REGULATOR AT 16PSI (16 PSI WHEN I PUSH TRIGGER ALL THE WAY )

IN GENERAL THE OTHER SET UP ARE
Material Valve was turned 4 full turns out from closed
the fan all the way out with a 1/4 turn in

I HAVE BEEN TRY EVERYTHING , STILL THE SAME PROBLEME ,
LOOK LIKE I'M SPRAYING PAINT WITH OVER REDUCER OR WATER............
I CAN'T BE WRONG WITH A RATIO 1:1

IM NOT A PROFFESSIONNEL THANKS TO HELP ME
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Old 04-10-2012, 05:15 AM
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Your vent hole is plugged...see if it sprays with the top off....Or there is an obstruction and the gun needs to be cleaned...start by dumping the paint in a clean cup (to be saved) and try spraying lacquer thinner through the gun.then take off the cap and inspect the small holes pull the pin and tip and clean them,look inside where the tip screwed in and see if theres any dried paint in there also....
Once your gun is clean and ready to spray ,Nason Ful-base sprays best at 2:1 even though it says 1:1,something you can try if it looks too thin or you get runs
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Old 04-10-2012, 04:01 PM
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Yes Everythings Works Fine
The Gune Is Very Clean
I Clean It Right After Using It Everytime
I Just Try The 2:1 Ration , And Still Not So Great
If I Want Blend I Have To Do Slowly , To Fast No Coverage...

I May Be Should Try 3:1
What Do You Think?
Thanks
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Old 04-10-2012, 04:11 PM
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3:1 is too thick, 1:1 seems too thin to get good coverage, 2:1 seems just right...Did you try spraying straight lacquer thinner through the gun to see if you get a good fan????
Ahh yeah, there is one other thing it could be....Are you using a screen in the cup???? if so take it out..that was the culprit for me and I hated taking it out but with the high solid clears and thicker paints it restricts the flow...
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Old 04-10-2012, 07:00 PM
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I always run 19-20 PSI at the gun . I leave the lower air adjustment wide open and set the PSI with the regulator, as you do.

Ron
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Old 04-10-2012, 10:59 PM
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Yes I Did Spray Straight Laquer ? No Problem

I Just Spend Time On Internet
And I Think It's More About The Paint
I Find Some Blog Where People Wasn't Happy With Nason Ans Saying It's Bad For Coverage
You Need A Lot Off Pass For Complet The Job
And Myproblem Was That Too.....
Someone Could Refere Me An Other Good Brand With Good Coverage For A Good Price
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Old 04-12-2012, 10:09 AM
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What color are you spraying the white paint over?

I've used Nason several times with satisfactory results if spraying it over a similar color. You get poor coverage with most any brand if spraying on top of a contrasting color. Are you trying a test pattern on a piece of paper before spraying the hood?
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Old 04-12-2012, 02:48 PM
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im spraying white color over a light grey silver
yes i did on a pieces of paper , it's so so
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Old 04-12-2012, 03:18 PM
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Dang, I'm thinking it should be covering really well. Maybe one of those substantially smarter than I will have a good solution. Sorry I couldn't help.
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Old 04-12-2012, 05:07 PM
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I use the Nason SS "Ful-thane" for all my solid colors when the budget is tight...two coats and your done...no added expence of clear and its easier to spray...Plus ,its hard to tell SS paint from BC/CC without sanding it....
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Old 04-13-2012, 01:45 AM
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BY THE WAY
TO TRY TO GET A GOOD COVERAGE TOOK ME A LOT OFF PASS AND some parts are kinda smooth while most of it is rough like sand paper.
should i wet sand it ( 800GRIP) UNTILL A SMOOTH FINISH then SPRAY THE CLEAR COAT ?

btw this is in my garage

THANKS
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Old 04-13-2012, 04:23 PM
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Quote:
Originally Posted by Vincentnova
BY THE WAY
TO TRY TO GET A GOOD COVERAGE TOOK ME A LOT OFF PASS AND some parts are kinda smooth while most of it is rough like sand paper.
should i wet sand it ( 800GRIP) UNTILL A SMOOTH FINISH then SPRAY THE CLEAR COAT ?

btw this is in my garage

THANKS
OK,Usually when you get a rough sandpaper tex its because you reducer is too fast for the temp a slower reducer should solve the problem,whats happening is the base is drying before it hits the car...You should wet sand the tex (400-600)to smooth it out then spray a couple more coats of base before you clear...OR the EZ way out is to bury it in clear and dont bother sanding or rebasing
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Old 04-13-2012, 04:34 PM
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IF IM DOING THE EZ WAY ? AFTER THE CLEAR COULD i SEE THE " rough sandpaper texture " ?

its not a good thingh to wet sand the base coat and just clear over without spray couple layer of base coat ( because i could spray again this rough texture ) ?


thanks
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