flat paint flashing - Paint Talk

Mark · 03-20-2009, 05:25 PM

Ok. Got a rental house a customer wanted me to paint. We sprayed on 2 coats of a sandy white colored flat paint put out by Ace Hardware (yeah i know Ace is not the best but it's the guys rental house and he doesn't want to spend a lot of money) so we spray the 2nd coat on it and have trails on top and bottom of pattern. We adjust pressure, change tips and filter, still not much difference. When it drys down you can still see the trails and some spots are flashing where we used no spackle at all (and its flat paint!). I know your supposed to prime spackle and drywall mud before paint and I had the guys do that as well. I don't have years and years of experience painting but I have a little and I need to trouble shoot this. I am using a zip spray 1700 airless put out by Graco and tried using 415 and 515 size tips but still not much difference. Finally out of sheer desperation I put on a 517 tip stood back and just misted over the walls to get rid of the trails. It got rid of the trails but still some flashing. I will end up just rolling on a coat to correct the situation but I would like to know how to deal with this next time. I need some help here.

WisePainter · 03-20-2009, 05:32 PM

Inexpensive paints with a high percentage of clay content tend to build unevenly if they aren't back rolled.
Even flat paints have a sheen.

nEighter · 03-20-2009, 05:55 PM

I have always heard you need to prime caulking when using flats.. otherwise they flash bad.

EDIT: oh you are talking about just the paint.. backrolling would be your best bet.. like Wise said.

jack pauhl · 03-20-2009, 06:39 PM

This isnt paint related. His guns shooting trails then his attempt to fix it by standing back is causing uneven dry patterns. Somethings not right with the pressure for the paint used or tip. Are you using the stock ASM 300 Contractor Spray Gun?

WisePainter · 03-20-2009, 08:12 PM

Quote:

Originally Posted by Mark

so we spray the 2nd coat on it and have trails on top and bottom of pattern. We adjust pressure, change tips and filter, still not much difference. When it drys down you can still see the trails and some spots are flashing where we used no spackle at all (and its flat paint!).

Quote:

Originally Posted by jack pauhl

This isnt paint related. His guns shooting trails then his attempt to fix it by standing back is causing uneven dry patterns.

With cheap paint you have to back roll the slop after spraying it or else it will flash and look horrible, most flats will.
I have a feeling he is talking about the lines that are supposed to be there so you can overlap the spray pattern 50% with accuracy.
Oh god I hope he isn't talking about that...

I am hoping that it is a matter of "fingering" where the paint sprays as lines instead of a uniform pattern. But if every tip is doing it...

Dude, I seriously hope he isn't talking about the factory installed pattern...

please.

Workaholic · 03-20-2009, 08:55 PM

Sounds like to me that back rolling could of prevented this problem.

Mantis · 03-20-2009, 09:01 PM

Sounds like a fingering issue. Cranking up the pressure should help even things out when you spray. start at 2000psi with a 415 tip and build from there. Otherwise, even if you are getting trails from your tip, backrolling will cure the flashing problem regardless.

NEPS.US · 03-20-2009, 09:03 PM

Quote:

Originally Posted by jack pauhl

This isnt paint related. His guns shooting trails then his attempt to fix it by standing back is causing uneven dry patterns. Somethings not right with the pressure for the paint used or tip. Are you using the stock ASM 300 Contractor Spray Gun?

JCM · 03-20-2009, 09:26 PM

You are spraying garbage material so put a big tip in like a 6-21or23 and spray into wet. What I mean is, if your spraying left to right hold the gun so it is spraying toward the left. Oh jeez how do you explain this? While your spraying in a clock ward direction turn your body so you are looking at your last pass and the paint will cast over the pass you just made. I'm screwing this up here. Turn your wrist and no in and out. still a bad explanation. I can show you if you Sub it out to me, lol. Joking, just back roll it and you won't even know you had a green horn behind the trigger, also try a bigger tip 5-17's are a bit small.

Mantis · 03-20-2009, 10:09 PM

Quote:

Originally Posted by JCM

5-17's are a bit small.

I dont know if I'd exactly call a 517 "small". 517 is the biggest tip we use, generally. and thats for blowing primer on drywall.

johnpaint · 03-20-2009, 10:34 PM

Quote:

Originally Posted by NEPS.US

Neps your going soft on us, you know he needs a 6-21 tip

NEPS.US · 03-20-2009, 10:42 PM

Quote:

Originally Posted by johnpaint

Neps your going soft on us, you know he needs a 6-21 tip

If you dont know how to spray wall then the tip really doesnt matter. He doesnt have a clue, so he should of been back rolling.

WisePainter · 03-20-2009, 10:55 PM

Why is it that all of the critical areas I paint are always right by a huge light source? I am thinking of the huge, smooth ceilings with windows or lighting that will show every flaw.
It took me a lot longer than I want to admit but I finally trained my lazy and stubborn self to back roll every ceiling because I really hate doing them, and I hate RE~DOING them even more.

johnpaint · 03-20-2009, 10:56 PM

Quote:

Originally Posted by NEPS.US

If you dont know how to spray wall then the tip really doesnt matter. He doesnt have a clue, so he should of been back rolling.

That's right and he might have a worn out tip, or about a hundred other things.

johnpaint · 03-20-2009, 10:59 PM

Quote:

Originally Posted by WisePainter

Why is it that all of the critical areas I paint are always right by a huge light source? I am thinking of the huge, smooth ceilings with windows or lighting that will show every flaw.
It took me a lot longer than I want to admit but I finally trained my lazy and stubborn self to back roll every ceiling because I really hate doing them, and I hate RE~DOING them even more.

Well it's a lot easier it you have someone helping you Wise.where is that 10 dollar an hour guy with strong arms

WisePainter · 03-20-2009, 11:01 PM

Quote:

Originally Posted by Mark

have trails on top and bottom of pattern.

He is describing the two lines that are supposed to be there so you can see where your overlap line is with your pattern.
If it was fingering he would describe a spray pattern consisting of many lines, or streaking.

johnpaint · 03-20-2009, 11:06 PM

I understand, but I have had fingers on both ends before also.

WisePainter · 03-20-2009, 11:11 PM

I can't handle this anymore...the OP isn't even a painter, and he used ACE flat on a rental as a favor for a friend.

great, i am now insane.
thanks thread.

johnpaint · 03-20-2009, 11:28 PM

Quote:

Originally Posted by WisePainter

I can't handle this anymore...the OP isn't even a painter, and he used ACE flat on a rental as a favor for a friend.

great, i am now insane.
thanks thread.

That's what I like about you Wise, you are the type of guy I would love to work with, You have a sense of humor.

Mantis · 03-20-2009, 11:47 PM

Quote:

Originally Posted by johnpaint

That's what I like about you Wise, you are the type of guy I would love to work with, You have a sense of humor.

Painting is SERIOUS BUSINESS