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Unread 11-17-2009, 08:20 PM   #1
mcurcio1989
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1976 CJ7 
 
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painting doors and ran in to big big problem.

So i spent the past two entire days stripping my doors of all rust and paint. I made sure to clean off the surface with paint thinner very thoroughly. I used gloves and what not to make sure no oils on my hands got on there. I primed everything with 2k kwik prime and let it dry overnight. The manufacturer said to leave 4-6 hrs for dry time in this temp. So i just went to lay the color on and it seemed to be going well. I was using omni au paint. Then after finishing the one door and starting on the next i looked at the first and all the paint was just bubbling off. It looked like someone dumped zip strip or something on it. So now i am at square one i need to re strip everything and i already spent $130 on this stuff. If anyone has any advice for me as to what went wrong that would be cool.

I have painted a handful of things with automotive grade paint before. I have even used this exact setup on other parts for this jeep before with no problems. The store i bought it from is a local place that supplies dealerships and auto body shops so its pretty legit.

Needless to say i am pissed off i hate painting, mostly just the prep, as it is. Know i get to do this all over again.

Sorry for the rant and again if anyone has any advice for me as to what may have gone wrong that would be swell.

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I have a dana 30 front axle and amc 20 rear if anyone is looking. Both are 3.54, drums, narrowtrack.
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Unread 11-18-2009, 07:14 AM   #2
cidd
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did the paint just bubbel up or was it dry and dusty looking and just didnt stick ??? did the primer stay down??? it almost sounds like the surface got contaminated with something. was the spray gun cleaned out good if any laquer thiner was left in gun and got mixed with paint it would cause this.
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Unread 11-18-2009, 10:04 AM   #3
mcurcio1989
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It just bubbled up. It was not dry and dusty looking. The primer adhered great. I am thinking that somehow something got on the primer. Or maybe what you said about lacquer thinner being in the gun. I didn't think i left any at all in there i blew it out good etc.
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I have a dana 30 front axle and amc 20 rear if anyone is looking. Both are 3.54, drums, narrowtrack.
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Unread 11-20-2009, 11:21 AM   #4
jay55
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Sounds like a paint "checking" or "crazing" problem.. Can be caused from being too cold. Were the doors atleast at room temperature when you sprayed? Could also be excessive film thickness. If the topcoat is applied too thick it can cause problems even if your in a booth. Spray a few very light coats and allow the paint to flash between coats. (usually 5 mins). Then apply a couple "wetter" coats to smooth it out and get gloss. First coat should just be a mist. Good luck hope it works out next time!
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Unread 11-20-2009, 12:31 PM   #5
mcurcio1989
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Alright well i had another thread in the cj forum. I am not one hundred percent sure what my problem was but this is what i did differently for round two. I added a water/oil seperator, used wax and grease remover generously, sanded the primer, made sure to do very thin first coats, and allow flash time. It was probably around 50-60 in my garage. I finished them up last night and they look pretty good. Didn't have any of that bubbling. I am pretty pleased with how they came out.
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I have a dana 30 front axle and amc 20 rear if anyone is looking. Both are 3.54, drums, narrowtrack.
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Unread 11-30-2009, 02:38 PM   #6
herbiehind
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Quote:
Originally Posted by mcurcio1989 View Post
Alright well i had another thread in the cj forum. I am not one hundred percent sure what my problem was but this is what i did differently for round two. I added a water/oil seperator, used wax and grease remover generously, sanded the primer, made sure to do very thin first coats, and allow flash time. It was probably around 50-60 in my garage. I finished them up last night and they look pretty good. Didn't have any of that bubbling. I am pretty pleased with how they came out.
maybe it was the paint thinner? not a pro by any means but when i did a frame i used alot of prep before hand to clean it . even when it looked clean if you hit it with more prep and a white cloth it was still dirty . gotta clean the hell out of it . and an etching primer helps too .
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Unread 12-06-2009, 10:21 AM   #7
CJ258
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If the topcoat was a polyurethane it will react to mineral spirits. If the primer is porous and mineral spirits are wiped on the thinner may not evacuate the primer in cold weather.
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Unread 12-08-2010, 01:32 PM   #8
mistertierney
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Yeah, as mention i'm no expert, but i though paint thinner was oil based? I've always used prepsol after sanding. Good to hear it all worked out in the end.
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Unread 12-08-2010, 03:34 PM   #9
magnetman
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Originally Posted by CJ258 View Post
If the topcoat was a polyurethane it will react to mineral spirits. If the primer is porous and mineral spirits are wiped on the thinner may not evacuate the primer in cold weather.
This answer sounds like what probably happened.
Only use min spirits to wipe if you are painting with regular oil base enamel.
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Unread 01-13-2011, 09:18 AM   #10
Liftedred95yj
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Been through stuff like that. Could be wrong flash time. And I think too cold. I think it should be close to 70 F degrees. And I don't think paint thinner should be used to clean surface, I think it's greasy/oily stuff if I'm not mistaken.
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