Paint question - tiny bubbles - again

[SCWDP911]

Some of you may have seen my recent thread where I had some severe swirling in the clear and a lot of very small bubbles. Many then thought the bubbles were solvent pop. The areas in question are only the front bumper, trunk lid, and rear decklid. I do not know if any of these areas were ever repainted on this car or not, but certainly not in the last 3-4 years anyway.

So, I wet-sanded and rebuffed and everything looked a LOT better (bubbles were definitely gone). The car has bee under a car cover since Saturday. I took it off and drover her to work this morning. When I got here, I noticed the bubbles were back, but a lot more of them it seems. I guess I can resand/rebuff again, but this could become a very tiring exercise. I was wondering this morning, after thinking about it for a while, if perhaps the car cover is causing this phenomena. The car had been fine since the wetsand and rebuff a few weeks ago. I had not noticed these new bubbles until after this weekend under the cover. I had a somewhat similar problem a couple of years ago when leaving the bra on for more than a day or two, only the bubbles were bigger then - and those bubbles went away after a few days in sunshine and heat.

The ONLY place these bubbles are occurring this time are on the hood and front bumper.

[sc_rufctr]

I am very concerned that your paint is still "active"...

It should be fully cured and stable. I've never seen bubbles appear like that before.
And the re appear after being rubber out.

I'm afraid you may be looking at stripping what's there and starting again.

[SCWDP911]

it has been at least 3-4 years, as I haev not had it done, and I don't think the PO had either ( I think he had it for 2-3 years himself)...

[fhernand]

Shane, came across your thread. With out seeing your car, I think your issue is in the clear coat. Rubbing these down to a smaller size will only fix it temporarily. Eventually you will rub off and burn through the clear coat. Solvent popping starts at the very base of the clear coat. In other words, the very first coat applied. Having said that, I would recommend a repaint. Eventaully, if you keep this car, it will need to get repainted since with time, your clear coat will start peeling away. Best wishes.

[SCWDP911]

I understand what you say Freddie, but is it "normal" to have this problem on paint this old?

[fhernand]

Shane, it's not normal. But, I have painted cars and seeing this happen right in the spray booth. The problems occurs from applying heavy coats of clear to fast without little or no flash time between coats. This problem normally happens on hoods or decklids because the applicator tends to load the clear with the hopes that it will flow flat. The culprit though, is the chemical vapors trapped in the clear coat that were never given sufficient time to flash. Go back to the paint shop and see what they can do for you. Otherwise, you will have to repaint. Sorry.

[SCWDP911]

Originally Posted by fhernand

Go back to the paint shop and see what they can do for you. Otherwise, you will have to repaint. Sorry.

This is why I am confused... this car has not been painted in at least 5-6 years that I know of.

[80-911SC]

Shane , this is after the dr chip stuff and its still doing it ??

I don't have any thing except stop covering it or check your cover IDK maybe its nuclear ???? Best of luck , hope you get it

[don gilbert]

just bring it here Shane and let my brotherJeff paint it when it warms up a bit You have seen his work. He is the best at spot painting and blending, and is very resonable when he is slow.

[don gilbert]

just talked to the master painter, shane, his idea, when you sanded and buffed it, you exposed fresh paint, and the cover trapped moisture, and the sun eched the water spots into the fresh paint. thats weired how you called me while i was reading this thread, havent talked to you in a year. see you tue. nite.

[SCWDP911]

yep, good talking with you Don. Kind of makes sense what your brother said, certainly coincides with the events. hope to make it there tomorrow afternoon. I will give you a call tomorrow when I know my schedule. Hmmmm, maybe this would be a good time to go to Olive Green on the car... better hope my wife does not read this thread.

[962porsche]

just like i said on your first post about this back on 12-28-09 . its not solvent pops !solvent pops look more like fish eyes . there not water spots . what your getting is from the metal substraight . the only fix is to strip the panels and refinish . at times the OE finish on cars will do this but in this case i would say NO ! from what i know about your car you were having panel alignment issues . in your case i would say its a repaint ! the shop that did the job eather had moisture in the air lines . (when painting a desiccant dryer is needed !) or they did not spray an E-type primer down over the bare mettal . that is a must when you have a bare metal spots bigger than a quarter . an other thing that may cause this is to much primer too fast (not letting the primer flash off between coats ) with that over time as the primer cures (not dry but cures ) it shrinks ! as it shrinks it starts to delaminate from the substright (metal) . as i stated before buffing it will not help and may make things worse . as the heat from the buffing will just put the panels throw another heat cycle that is not needed and worsing the problem . at this time no matter what the cause is. there is no saving it ! but lessen the heat cycles from sun to shade and say your prayers to the porsche gods and hope it does'nt get to bad to fast .

[bxtech]

don gilbert........Your '75 Targa looks fantastic! Saw your "garage" pictures........you did a GREAT job on it! I really like the custom touches, and the "mixture" of various years of 911 styling. The color choice looks great too! I'm sure it turns quite a few heads going down the road! It's definitely one very unique car!

[don gilbert]

thanks, man, its amazing what you can do to an old car by throughing 30g. at it. I started this car before i discoverd pelican, now i want to backdate one.

[Kemo]

Originally Posted by don gilbert

...now i want to backdate one.

be sure and post here! I would love to see the step by step. from looking at the 75 Targa, you guys certainly know what you are doing when it comes to paint and body work.

[ErVikingo]

I have had the same problem, explanation i received was bad prep for a galvanized car.

[stormmaster]

I think it is that plot thing you have going backfiring on you...I do hope you find a solution though. Good luck.