need help with metallic stripes and splotches.
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This is getting ridiculous. I am painting this guys Firebird Maui Blue. It’s a light metallic blue. I have painted the hood twice because I cant get rid of the tiger stripes or splotches. The rest came out great.
I am using my lph-400 with the silver cap. I know it’s not recommended with metallic but I have nothing else right now to use.
I tried to spray it wet with a second coat up higher with the pressure turned up trying to dust over it with an X pattern. I also did it with the gun about 6 to 8″ away.
Not sure whats going on?
Can someone suggest something else to try.
I only have enough paint to paint the hood maybe two more times so I need to get it right this time.
is your gun clean? maybe try spraying each coat perpendicular to your last?, then maybe in an x pattern but keep your coats light
The gun is always super clean.
I’m having trouble spraying it with out making it dry. It seem when I try to lay it wet it stripes.
So, I should lay it head to toe and then side to side? Do it when the first coat is wet or wait for it to flash before the second coat the other direction?
Seem like thats the same thing as doing an X???
yea head to toe and side to side. always let it flash fully before you recoat. spraying it too wet makes it blotchy, i had the same problem the other day but it was my fault because the spray pattern was messed due to the gun not being clean. when i meant an X pattern i meant from corner to opposite corner. try it like your doing a drop coat but caution not blending it with the fenders will make the color different even if its the same mix.
What are you using for paint ???
try turning ur fluid on that gun till one thread shows move up close an get it sorta wet hope this helps that gun aint really known for its met control drop coating the snot out of it might help 2 drop ur air pressure ta about 15 psi step back around 18 iches an try an mow it out do that an dont worry about the texture u will at least fix it with your clear an good luck;)
Ive had the same problem with my iwata always seems to be a mission on bonnet’s (hood) do what bondo told ya wind your fluid in a bit. try overlapping more and increase your distance from the panel.. Also check your fan adjustment wind it right out and then wind it back in a few turns in. Also are you using a slower thinner??
thanks guys… I am using PPG base with PPG med reducer 870.
I am going to try it again tomorrow morning. I think I am going to try it like you guys said. Up a little higher. I’m going to try to just dust in the color to cover in an X pattern one more time and hope it blends good this time. Last time I did it at 10 and 15 psi. Not sure what I should do this time?
I’ll let you guys know how it came out.
[quote=”Jinx” post=18136]thanks guys… I am using PPG base with PPG med reducer 870.
I am going to try it again tomorrow morning. I think I am going to try it like you guys said. Up a little higher. I’m going to try to just dust in the color to cover in an X pattern one more time and hope it blends good this time. Last time I did it at 10 and 15 psi. Not sure what I should do this time?
I’ll let you guys know how it came out.[/quote]
Get rid of the 870 and get some 885 at least. you want to slow down the mix to give the metallics time to orientate. 870 is just to fast for that color on a hood. 885 or 895 would be better. also if you have some dbc500 you can mix that 50:50 with your base and do your last coat or 2 with that mix. It really helps on difficult colors when using DBC[quote=”ding” post=18138][quote=”Jinx” post=18136]thanks guys… I am using PPG base with PPG med reducer 870.
I am going to try it again tomorrow morning. I think I am going to try it like you guys said. Up a little higher. I’m going to try to just dust in the color to cover in an X pattern one more time and hope it blends good this time. Last time I did it at 10 and 15 psi. Not sure what I should do this time?
I’ll let you guys know how it came out.[/quote]
Get rid of the 870 and get some 885 at least. you want to slow down the mix to give the metallics time to orientate. 870 is just to fast for that color on a hood. 885 or 895 would be better. also if you have some dbc500 you can mix that 50:50 with your base and do your last coat or 2 with that mix. It really helps on difficult colors when using DBC[/quote]Very good advice here. I think DBC flashes fast with just 885 even in moderate temps. Also the silver cap isnt the hottest cap for metallics. It is hard to get anything but a small droplet out of it and that is exactly the opposite of what you need with metallic base. By the time you get the droplet size large enough the pressure of the gun is too low and it has a uneven pattern.
If your interested I have a purple cap for that gun that is made for hard to spray metallics. I would sell it if interested. I don’t spray solvent anymore and doubt I will ever use it again.
I use to use ppg dbc and it has a habbit of modeling. I use a iwata lph400 1.4, and it did great. I started reducing the base 2:1 rather than 1:1. I sprayed at 20psi using about a 75% overlap This seemed to help tremendously. Not only for coverage but for the modeling issue as well.
I love my Iwata for clear but won’t use it for base.
Too easy to stripe and mottle with metallics.
Oh sure I can make it work, spray careful and up the pressure,
but why fight it, my other guns do base so much easier and better.
I just use the Iwata for clear.
I once read that LVLP guns aren’t as good for base as HVLP’s
and HVLP’s aren’t as good at clear as LVLP’s.
I don’t know if that’s really true but it has worked out that way for me.
My old el-heapo Astro does base way better than my LPH400.have you tried messing with reducers? i dont use ppg but id try a hotter retard.
It’s funny you mention the LPH-400, slower than molasses in january gun, I love so dearly as not being good for metallic base. I had never heard that. The first 2 metallic paints I ever shot were a silver and a deep blue, both with the stock tip on the iwata. I had bad mottling on the first try with the silver, because I was trying to spray it like clear…… oh well. I redid it and it was just fine. The blue was my first attempt at a blend, and one blended area I literally could not tell where the old paint started and the new paint stopped. I just spray it out real lightly, and did 3-4 coats. That probably sucks for you production guys, but it worked fine for me. SW/MS paint, cold weather reducer.
I cant recall having any issues spraying metallics with my iwata. Its works awesome for base and clear. But then again not every painter sprays the same. I use diamont and if applied The way its supposed to be its hard to mottle or stripe. I had a hard time with dbc though, it loves to mottle. After I got used to it, it was great.:clappy
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