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PPG Paint school.....waterbase

Autobody and Paint Tech Discussion

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shaggydjlg
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Re: PPG Paint school.....waterbase

Post by shaggydjlg » Sat Jul 10, 2010 2:30 am

Ive been gone for too long yes melloelky ive been told the same thing and i do sleep better at night also because i sand the E-coat before spraying.Ive sprayed a lot of cars with this water base and some turn out great and others.... mostly the light colors and black metallics seem to get the mottling effect going on.We tried a lot of differant things and so far on some colors we really hate it.We learned by turning the air pressure up and holding gun farther away (about 2 foot) on the control coat it seems to help a lot.We have also noticed that a lot of there paint chips dont match the color of car.Hows the colors and painting for u going??
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Re: PPG Paint school.....waterbase

Post by LS6 Tommy » Sat Jul 10, 2010 9:04 am

shaggydjlg wrote:
My shop decided that we may not use the dryer and we will let it air dry it takes a bit longer but right now we dont see a need for it because we paint alot of panels at one time.And it is still dries faster then solvent.



How's that working for you so far? I'm no body man, I'm just curious becuase PPG says NOT to "air dry" H20 based. They recommend corner fans for down draft booths because they want turbulant air flowing all over the paint. Both shops I deal with had them installed when they started using H20 based paints.

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shaggydjlg
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Re: PPG Paint school.....waterbase

Post by shaggydjlg » Sat Jul 10, 2010 10:27 am

HMM ive never heard that comment from ppg infact they say u can air dry paint but dont recommend it just takes longer and u have a 24 hr window to clear.we havent had any problems with the paint drying we will use the hand held blowers a little bit but only on bumpers we didnt have to add anything new to paint booth as far as turbines or other special blowers.
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Re: PPG Paint school.....waterbase

Post by melloelky » Sat Jul 10, 2010 8:05 pm

shaggydjlg wrote:Ive been gone for too long yes melloelky ive been told the same thing and i do sleep better at night also because i sand the E-coat before spraying.Ive sprayed a lot of cars with this water base and some turn out great and others.... mostly the light colors and black metallics seem to get the mottling effect going on.We tried a lot of diffent things and so far on some colors we really hate it.We learned by turning the air pressure up and holding gun farther away (about 2 foot) on the control coat it seems to help a lot.We have also noticed that a lot of there paint chips dont match the color of car.Hows the colors and painting for u going??

if nothing else,i've found that it's worth the time/effort to do as many spray out cards as needed and keep them on file for future use,it's a pain when their's ten variants but worth it if the chips from the jobber aren't working out for ya.tell the writer in the office to start including time for these let down cards to aid the color matching when they write the job.it works out in the end because you do them everytime you run into a color you havn't done yet but STILL write/get paid for it everytime.we've been using whats called a sun gun.its a light made by 3m that produces sun-like brightness if the sun isn't outside for comparsion.i also find that before trying to match i will compound an adjecent area even by hand to get a better look @it.that control coat in the end is where it's at,you sound like your far enough away with the increased pressure too.i could see the mottling with the mettalics but not with the solids.i know its a stupid ? because the h2o covers better/faster than the solvent but are you putting enough material on?could it be the sealer showing through?one thing i've had to change from mixxing the solvent was to use a rubber mixing paddle vs the old wooden stick so your sure to get all the metallics from the sides of the cup.are you using envirobase or what?
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shaggydjlg
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Re: PPG Paint school.....waterbase

Post by shaggydjlg » Sun Jul 11, 2010 12:31 am

yes we have a sun gun and yes we r using eviro base from ppg the solids u do not have to put a control coat over it .I am running 4-5 coats over all they only recommend 3 coats plus a control coat sometimes ill control coat it twice I only get the mottling on certian colors!! when we sprayed solvent base coat the silvers were terrible to match and blend. With the enviro base we do not have any problems at all no mottling or anything it looks perfect and it is sprayed exactly like I was taught.
We did a taurus x a light blue color we could not blend it for the world and the mottiling on it was rediculous we even had a tech guy come in and help and he couldnt figure it out.We finally messed with the air pressure and gun distance and got it to look good it took 3 days to paint it!!! The other color was a black w/ gold metallic flake a saturn color I sprayed it and cleared it.Looked perfect in the booth when i pulled it out in the main shop the hood was mottled bad I ended up letting that one go out because when u pulled it in the sun u couldnt see it.Some people wont pay attention to the color as long as there isnt a dent in it.But this light blue really kicked us hard.I was just wondering if u ever had the same problems or not
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Re: PPG Paint school.....waterbase

Post by melloelky » Sun Jul 11, 2010 9:45 am

shaggydjlg wrote:yes we have a sun gun and yes we r using eviro base from ppg the solids u do not have to put a control coat over it .I am running 4-5 coats over all they only recommend 3 coats plus a control coat sometimes ill control coat it twice I only get the mottling on certian colors!! when we sprayed solvent base coat the silvers were terrible to match and blend. With the enviro base we do not have any problems at all no mottling or anything it looks perfect and it is sprayed exactly like I was taught.
We did a taurus x a light blue color we could not blend it for the world and the mottiling on it was rediculous we even had a tech guy come in and help and he couldnt figure it out.We finally messed with the air pressure and gun distance and got it to look good it took 3 days to paint it!!! The other color was a black w/ gold metallic flake a saturn color I sprayed it and cleared it.Looked perfect in the booth when i pulled it out in the main shop the hood was mottled bad I ended up letting that one go out because when u pulled it in the sun u couldnt see it.Some people wont pay attention to the color as long as there isnt a dent in it.But this light blue really kicked us hard.I was just wondering if u ever had the same problems or not

i know it's a solvent thing but with the control coat try crossing your coats like top to bottom vs side to side to try and lose the stiping/moddling.we've run into our share but nothing like what you're runing into with the water.the golds and silvers in solvent gave me troubles before.i found that when i thought i was ok i'd spray a coat of dbc 500 to make it shine for a bit and if needed i'd dust in some more base over that.if it was easy everyone would do it.
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Re: PPG Paint school.....waterbase

Post by Martin_09 » Wed Feb 05, 2014 4:15 am

Interesting forum. I am a diploma holder in car painting. The Auto body painting course that I had joined offered e with proper knowledge of equipment, styles and types of paints available in market. Today my productivity has been reached to two car paint a day.

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Re: PPG Paint school.....waterbase

Post by RatMalibu » Wed Feb 05, 2014 6:23 pm

What gun are you spraying with shaggy?
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melloelky
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Re: PPG Paint school.....waterbase

Post by melloelky » Wed Feb 05, 2014 10:09 pm

RatMalibu wrote:What gun are you spraying with shaggy?
he hasn't been on here in a few years.
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Re: PPG Paint school.....waterbase

Post by RatMalibu » Thu Feb 06, 2014 7:21 pm

lol holy dead thread bump....I didn't even pay any attention to the dates... ](*,)
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Re: PPG Paint school.....waterbase

Post by t5montecarlo » Sat Feb 08, 2014 8:11 pm

Look at his profile and try sending him email

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