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Old 05-24-2010, 12:32 PM
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***? Yellow spots coming through base coat

anybody ever had this or seen this? yellowish spots coming out of the base paint, like its coming right through the blue, last year i had like 4 spots, but they dident come out for like 4 months after the car was repainted, but now a week later and one is coming out on the fender, not the same spot as last year, im stumped, got no idea what so ever

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Old 05-24-2010, 01:08 PM
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why not post a picture ?
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Old 05-24-2010, 01:42 PM
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What was done to the car BEFORE you painted it? Body work, primer? Did you seal the car before you painted?
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Old 05-24-2010, 03:11 PM
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yep, primed with high build primer, sanded then paint, dident put on any sealer, will try to get a pic in a bit
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Old 05-24-2010, 06:47 PM
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its not showing enough for the camera to pick up, but here is a pic of the car
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Old 05-24-2010, 07:05 PM
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Are those spots where you primered it?
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Old 05-24-2010, 08:45 PM
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Sounds like a problem I once had. Two questions....... did you use any lacquer on it? If you did, what kind of body filler or glazing putty was used?

If there isn't any lacquer, Don't bother to respond. It's not the same problem.
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Old 05-26-2010, 06:17 AM
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without full details of the process from the git go no one will be able to help you as there are a dozen things that can go wrong and cause your problem.
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Old 05-26-2010, 06:43 AM
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bondo bleed from red hardener.
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Old 05-26-2010, 10:32 PM
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I agree with shine i had the same problem on a white car it had that yellow ring where the repair work was done
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Old 06-10-2010, 05:36 PM
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and its getting worse, other fender is doing the same thing? How colud the blue paint seep past the high build primer and into the bondo? there is like 5 coats of high build over the bondo, its just dupli colour high build in the spray can, but that shouldent matter
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Old 06-10-2010, 05:37 PM
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a small dent, filled with bondo, with red hardner, sanded smooth, 5 coats of high build primer, gray, and blue base coat, thats about it
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Old 06-10-2010, 06:04 PM
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This use to be a big problem when base coats first came out and what caused it was a peroxide reaction in the bodyfiller, usually it would happen to people doing little spot repairs or warranty work where the bodyman would watch the filler dry, sand it right away and then slap some primer on it.

In other words the filler did not have time to gas off, so some of the shops took the primer step away from the bodyman and just the 30 minutes it took to get the car taped up and in the paint shop stopped a lot of this.

There were other factors, we also learned at that time and one was a certain UV inhibitor used (#1130 if I recall right) in the clear would aggravate the problem, Ciba made some changes to that UV and that helped, (some), also certain polyols (resins) used in the clears also contributed to the problem.

We have since lived and learned (oh it was costly!) and today, it is really not much of an issue.

HOWEVER, you overrode all that great change in technology and chose to use a spray can of primer, (lacquer), that sure can do it and to answer your question about it traveling through all the paint, it will sure do it.

If its bad enough at this point, even if you sanded and coated with epoxy, it can come back again.

Edit:
I should also add using to much hardener in the filler does not help either.

Last edited by BarryK; 06-10-2010 at 06:10 PM.
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Old 06-10-2010, 07:01 PM
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The problem I had was with Rage body filler. If I used any kind of lacquer product over it, it would release a stain from the body filler....sometimes months later!!! It got me on about 5-6 jobs!

I finally asked House Of Kolor's tech line, and they told me about that.

I stopped using Rage... switched to Fiberglass-Evercoat brand, and the problem was gone. It's the only time in 40+ years of painting that it happened.
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Old 06-10-2010, 07:45 PM
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thanks a million guys, I appreciate the help and info, So it looks like 800 dollars down the drain agian, plus I did all the labour myself, probally around 40 hours worth of work, I think the primer part is o.k, as it is pretty much on the entire car, like 4 cans, I guess its just where the bondo is under the primer, if this is the case, there will be alot more yellow spots than this on it very soon, also the bondo was like 5 days dry before primer went on
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