Wicked paint reaction - why?

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challengergary

challengergary

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My brother shot his 71 Camaro yesterday and had some serious issues with a reaction between the paint and primer. What caused this? Luckily, it was isolated and most of the car looks great.

The primer used was 5 Star 5425 2K Urethane and the paint was H.O.K. Apple Red KandyBase. Clear was Valspar.

I used the same basic combination on the 70 Challenger I painted Friday and had zero issues
 

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I have not painted in a long time and don't know about the new paints and primers
I have painted allot back in the 90'es and that looks like some one did not let the primer
cure or it did not get scuffed/sanded well, or good enough to let the primer release the . the.... heck I can't think of the word/name of what it holds in the primer that must be released before painted.. sorry I am old school, and yes this has happened to me before
with enamel and base coat/clear coat....... Did this happen after the clear was shot ?
 
was the reducer too hot? im not a painting expert but I had a similar issue when I painted I still had some of the cleaning thinner in my gun and it did the same thing
 
could be that wax and grease remover was not properly wiped up and allowed to dry

could be the base wasn't allowed to flash long enough if that was the last part based and first cleared- or if the base got a little heavy there and needed extra time
 
CudaChris67 said:
could be that wax and grease remover was not properly wiped up and allowed to dry

could be the base wasn't allowed to flash long enough if that was the last part based and first cleared- or if the base got a little heavy there and needed extra time
Click to expand...

:thumleft: sounds like a very good possibility
 
ef8340 said:
was the reducer too hot? im not a painting expert but I had a similar issue when I painted I still had some of the cleaning thinner in my gun and it did the same thing
Click to expand...
Could have happened if that was a starting spot, I bet he does like most of us and has a big red spot on the wall or a piece of card board he starts/test his gun before going to the car :D
 
Looks like the paint was sprayed on body filler and should have been primed and scuffed don't it :glasses7:
 
I'd say the wax grease remover is the culprit....
I painted the inside quarters in my scamp and got the same reaction, just after I had wiped them down with wax remover....too anxious to get it done, so I had to slow down and do it again..
 
Yeah, my brother admitted he was in a hurry and really laid the paint on. Patience grasshopper...

Also, I gave him a new nickname Mr. Krinkle

[ame="http://www.youtube.com/watch?v=TOdo7dhvSwg"]Primus - Mr. Krinkle - YouTube[/ame]
 
Primus rocks,lol. Looks like lack of patience. Or possibly, a reaction,to the clear coat reducer. Why I wash down,with Simple Green,wait 24 hours.( as for wax and grease remover....).Less chemicals involve,smoother transition.
 
shot the clear while the basecoat was dry.i usually base it then look the whole thing over and shoot the clear the next day.....
 
Spoke with my and it looks like it was really just a lack of patience on his part. He did not allow the first coat of basecoat to truly flash before he shot the second coat. Plus his second coat was too heavy. Expensive lesson for him to learn but I bet he does not do that again.
 
That base looks insanely heavy.

I don't think this has so much to do with wax/ grease remover as it does flash time in between base coats and how heavy each coat is.

Wax and grease remover usually flashes within enough time to clean/ check the gun and mix base. By the time you've gone over the car with a tac cloth and you have the paint in the gun, that wax/ grease remover is gone.

Look at the film thickness on those ridges. That tells you right there what the problem was. Solvents from prior base coats trying to flash, under a new film of heavy base.

Take your time with base. It's all about even color. Better off with light coats, then light to medium coats, multiple times.

I clear in the same session, but I go around the car after 15 min with the last of the base in the gun, nib any dust with 1000 and blend those spots, come back in with the clear gun in one hand and a tac cloth in the other, hit the entire car before clearing. I also tac lower areas during base to keep from dust buildup. Shoot the roof, come back in, tac off the hood and decklid. I go through about 3 tac cloths with every complete paint job. Night and day quality of layout when it comes to metallics, too.
 
I got the same wrinkling in a few spots when I sprayed epoxy paint over Rust Destroyer primer too soon. It said to wait 72 hours and I did, but today I give it a week or leave it in the sun for a few days. It wrinkled in inside corners where it dries slower. The primer is mostly mineral spirits type solvent.
 
I think ef8340 has the answer....I used this same combination, all looked great so I went to watch a football game & had this effect when I returned...Called the paint mfg & turned out the paint store had sold me the wrong reducer!!!
They replaced the paint, but I had to sand it all back down & redo it!!!
 
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