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Old 09-23-2010, 08:52 AM
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PPG clear popping off

This is the second time this has happened. The car sits outside 24/7 in the midsouth area of 95* summers and 30* winters with lots of sunshine, no pollution and no acid rain that we know of in the Arkansas-Missouri mountain border area.

The car is one of those that the factory clear died and peeled.
The car was sanded well, aluminum hood stripped, deck lid sanded to bare metal, primed, sealed, base, and clear all PPG products. B/C was Omni.

In each case the navy blue paint lasted 3 years (almost exactly) and then began to pop. Gazillions of pops, all came up within a 3 week time frame the last couple months. The pops are 95% on the horizontal surfaces. The vertical sides are OK so far, but the C pillars are popped.

The pops look like tiny water droplets on the paint. Pops of .030 to .125 in diameter. Each is a dome of clear that has popped up and released from the blue base. Slight massaging makes the bubbles shed the clear leaving the blue base intact. A few have the B/C intact (.060) in the center of the pop and then the peel around it like a target.

Anybody have any idea what is causing this?

I have a personal hot rod to be painted soon and have always been a PPG loyalist. But???

Thank you for all help.

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Old 09-23-2010, 09:38 AM
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By the way, that Omni clear seemed to be very soft and scratched easily even with a fingernail. Much of a rough scrape pulled it off all the way to the primer.

Little or no orange peel. It went on 95% slick.

Tech sheets were followed religiously. All products were PPG.

My paint shop buddy has stopped using Omni/ Shop Line and using only top line PPG, now using a lot of 4000 series clear now.

Just looked again closely.
In some areas it looks like the pops are lined up in rows.
Maybe a tack rag over the base????? problem???


I was holding the hose when the car got painted.
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Old 09-23-2010, 09:46 AM
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Check with your PPG guy, there was an issue with the Omni and the same clear in the shop line, not sure the part number, see what they have to say.

Had to do with mils or lack of.
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Old 09-26-2010, 08:16 PM
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Quote:
Originally Posted by BarryK
Check with your PPG guy, there was an issue with the Omni and the same clear in the shop line, not sure the part number, see what they have to say.

Had to do with mils or lack of.
Thanks, I will try again.
The "local" PPG guys are ........... how to put it kindly.......?......\

dumb sheitzes.
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Old 09-27-2010, 06:00 AM
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first I'd look at your air supply (filters) that sounds exactly like water or oil in the lines.
then I would concider using a better paint Omini has a fairly decent clear but theirr base kinda (to put it nicely) sucks....
It could also be the application of the base (to thick to fast) Omini takes a lot of thin coats that dry very quick ,its very ez to spray the first coat to thick and trap the solvents..PPG has much better paints than Omini
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Old 09-27-2010, 10:35 AM
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Quote:
Originally Posted by BarryK
Check with your PPG guy, there was an issue with the Omni and the same clear in the shop line, not sure the part number, see what they have to say.

Had to do with mils or lack of.

imo it is lack of mills.

the omni base sucks.

the omni clears are okay.

the mc270 production clear i have used a ton of it and always put 3 coats of it on my repair jobs b/c its water thin.

the mc161 is the high solids line in the Omni clear and is okay.


but you do get what you pay for and both are Fair at best.

i don't use anymore of Omni line clears all mine have been switched over the SPI sutff and Quality is WOW

i have used a lot of the 3000 and 4000 series Deltron clears.

i hated the 3000 it kicked way to quick.

the 4000 i actually still have some on the shelf and loved it.

but way over priced imo.

Best of luck and hopefully you can solve your problem,Travis
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Old 10-07-2010, 05:23 PM
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Thanks for all,

it's getting worse by the week.

mc161 with 3 heavy coats, little sanding and polishing. Base was fine.

You're right.
Stick with the best and use 4000 clear.
No 4000 out there that long yet.
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Old 10-08-2010, 06:52 AM
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I used to like that 161 clear it was a pretty good deal and I got a darn good job out of it,but I gave all those clears up once I tried SPI ...its comparable to glasuit and is priced like Nason ....100.00 a gal ....if you ever sand and buff it you'll never go back, its some of the best clear I've ever used ...at any price...

Last edited by deadbodyman; 10-08-2010 at 07:00 AM.
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Old 10-08-2010, 06:54 AM
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161 is a pretty high solids clear,3 coats should have been enough with a little polishing.

maybe a bad batch?
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Old 10-08-2010, 07:08 AM
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I dont believe in bad batches,I've never got a bad batch in all the years I've been painting...I'm not saying it dont happen ,just that its never happened to me...The hardener on the other hand will go bad and get thick after opening or sitting on the shelf to long...so putting a little of your mig welding gas in the can before closing it up will prolong its life conciderably...(the gas is heavier thar air )
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Old 10-12-2010, 11:46 PM
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Im tempted to say its the fact it's Omni. When a manufactuer won't warranty their own product, I'd say that's a sure fire sign.
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