More Paint Blisters

Discussion in '5 Series' started by Silverbeemer525, Jan 2, 2020.

  1. Silverbeemer525
    Offline

    Silverbeemer525 Site Supporter

    Joined:
    Dec 28, 2015
    Messages:
    114
    Likes Received:
    22
    Location:
    Hinckley
    Ratings:
    +41 / 1 / -0
    My mineral white G30 has gone back in to Sytners in Coventry today for paint repairs, again! It is now just 2 years old. I purchased it new in December 2017. Before I took delivery Sytners found a mark on the LHR wing, so they repaired (repainted) it. The colour match was superb, completely indistinguishable. However, in December 2018 I found a mass of tiny blisters in the repainted area. It went back under warranty and was repainted again in January 2019. This time the colour match wasn't so good, although they blew it across most of the LHR door so it blended pretty well but it always appeared slightly different from the bumper. It seems common with mineral white cars that the bumper colour differs very slightly from the metal panels. Maybe the bumper paint is a different formulation from the metal panels? It is an awkward colour to match, comprising three coats: base white, translucent metallic/pearlescent, then clear lacquer.

    Back to the main issue. In December 2019 I found that the blistering effect had returned, so today it has gone back to be repainted a third time. Needless to say, I'm pretty annoyed that they've made the same mistake twice. They claim it hasn't happened on any other cars, but to me there seems to be a fundamental problem in their painting process. I've suggested that they need to carry out a thorough investigation and sort it properly this time! See attached pics:
    6Dec2019b.jpg 6Dec2019c.jpg 6Dec2019d.jpg 6Dec2019e.jpg 6Dec2019a.jpg
     
  2. Postman
    Offline

    Postman

    Joined:
    Aug 24, 2015
    Messages:
    96
    Likes Received:
    28
    Ratings:
    +50 / 0 / -0
    Oh dear that looks pretty horrible. If that’s their second go and actually the third time the panel has been painted I’d be thinking there is a problem with whatever is under the paint. Be that the metal or the under coats. Not good enough and I think you are on the correct thought process but I don’t think they are .....
     
  3. Peter
    Offline

    Peter WARLORD Site Supporter

    Joined:
    Aug 5, 2015
    Messages:
    1,546
    Likes Received:
    782
    Location:
    Highland Region
    Ratings:
    +1,189 / 0 / -1
    Something must be seriously wrong with their procedures.

    From my time in a body shop years ago, first thing that comes to my mind (for the old cellulose days), is moisture has been trapped in the paint. With water based paints, is that possible these days?

    Guess it is some sort of contaminant, somewhere in the process.

    Peter
     
    • Agree Agree x 1
  4. Verbarthe
    Offline

    Verbarthe WARLORD Site Supporter

    Joined:
    Jul 31, 2015
    Messages:
    1,382
    Likes Received:
    562
    Location:
    Buckie
    Ratings:
    +941 / 0 / -1
    Definitely looks like moisture under the paint to me .Seen a few pics like this elsewhere , but regardless of what s causing it , it needs sorting Don t accept anything but a perfect match this time .Hope you get it sorted to your satisfaction this time around .
     
    • Agree Agree x 1
  5. snrbrtsn
    Online

    snrbrtsn WARLORD Site Supporter

    Joined:
    Jul 30, 2015
    Messages:
    2,146
    Likes Received:
    808
    Location:
    Aberdeen
    Ratings:
    +1,295 / 0 / -2
    Wow that does look bad
    I had quite a fight on my hands when I found similar marks on my Mercedes at less than 6 month old
    Played yo-yo with warranty advisor and paint shop manager, finally involving a Mercedes UK with the attached “Mercedes” publication before effecting repair
    Very frustrating, I can well appreciate hopefully third time lucky!

    https://xentryportal.i.daimler.com/...s/diagnosing/sh_diagnose/en_1_paint_pdf_1.pdf
     
    • Informative Informative x 1
  6. idrussell
    Offline

    idrussell Site Supporter

    Joined:
    Aug 3, 2015
    Messages:
    307
    Likes Received:
    120
    Location:
    Durham City
    Ratings:
    +159 / 0 / -1
    As others have said that looks pretty bad and I would be extremely annoyed. It could be moisture but I would more suspect silicone as the contaminant. At work one of the processes we have are three fully automated paint lines for mainly powder coating but also wet paint. Many years ago we banned silicone throughout our plant because of similar reactions. Even someone using a deodorant nearby can cause particles in the air to cause issues. As it has happened now several times I would suspect poor preparation and / or silicon underneath any undercoat. Really they need to go back to almost the raw surface and properly re-paint otherwise it could keep re-occurring
     
    • Like Like x 1
  7. Silverbeemer525
    Offline

    Silverbeemer525 Site Supporter

    Joined:
    Dec 28, 2015
    Messages:
    114
    Likes Received:
    22
    Location:
    Hinckley
    Ratings:
    +41 / 1 / -0
    I had Autoglym Lifeshine from new. It was when this was being done that the original problem was discovered, which needed the first repaint. I wondered if some could have remained. I phoned Autoglym technical helpline but they thought not. They thought it must have been removed properly or it would have shown immediate problems. Trapped moisture sounds a likely cause but from idrussel's comments I wonder if some silicone is trapped several layers down. In both instances the finish appeared ok at first, through the remainder of the winter and summer, then occurs in the following winter. Is this consistent with moisture or silicone? Would water be more likely to cause a problem when it's hotter in summer rather than when it goes cold again?
     
  8. Mieke
    Offline

    Mieke WARLORD Site Supporter

    Joined:
    Sep 8, 2015
    Messages:
    2,344
    Likes Received:
    810
    Location:
    Cheshire
    Ratings:
    +1,701 / 2 / -1
    How strange. It's obviously contamination of some kind causing the blisters, but I would be surprised if it's water. The compressor systems for a professional bodyshop should have efficient moisture removal systems and filters to prevent that. It's more likely to be a chemical contaminant, such as silicone, and suggests that the panel was not properly decontaminated the first time it was resprayed. As has been suggested, it will probably require the paint removing down to the original factory undercoat, before repainting for the third time. :rolleyes:

    Does make me wonder whether the car had some form of ceramic coating or paint sealant applied when new.
     
    • Like Like x 1
  9. Silverbeemer525
    Offline

    Silverbeemer525 Site Supporter

    Joined:
    Dec 28, 2015
    Messages:
    114
    Likes Received:
    22
    Location:
    Hinckley
    Ratings:
    +41 / 1 / -0
    I went to collect my car last Tuesday. They assure me that they have stripped the paint right back to below the original finish, ie, before either of their previous repairs. However, the colour match was quite poor, I think no better than the last time they did it! They had blended it down the side, but it was noticeably different from the boot lid, and even more different from the bumper (which never quite matched the metal panels, even from new; the bumper has always differed slightly from the RHR wing too). It seems common on mineral white cars that the bumpers are not an exact match to the metal panels. The result was that I left my car with them and asked them to sort it properly. They got the colour match right the first time they did it, so they should be able to do it again! Searching across various websites and forums reveals that mineral white is a very difficult colour to match. I now regret getting it, and wish that I had ordered alpine white instead. My last car (F10) was alpine white so I thought mineral would be a bit of a change, and it was a no-cost option on the 530i G30. Big mistake! It is a nice colour but I would never order it again.

    They say it should be done by next Monday and, hopefully, they will have got it right this time!
     
    • Like Like x 1
  10. MrMcG
    Offline

    MrMcG

    Joined:
    Dec 6, 2019
    Messages:
    162
    Likes Received:
    99
    Ratings:
    +107 / 0 / -0
    Fingers crossed for you mate

    I can imagine it's driving you up the wall
     
  11. Kev2005
    Offline

    Kev2005 WARLORD Site Supporter Good Egg

    Joined:
    Aug 10, 2015
    Messages:
    1,434
    Likes Received:
    253
    Ratings:
    +387 / 0 / -1
    Not looking good, I'm guessing car only has 3 year warranty? so what happens if it happens again in 12 months time or just over? Maybe worth a conversation with them? As they will no doubt expect you to pay next time or at best case contribute, maybe you can wangle a 2 year warranty on the paint?

    Kev
     
  12. Silverbeemer525
    Offline

    Silverbeemer525 Site Supporter

    Joined:
    Dec 28, 2015
    Messages:
    114
    Likes Received:
    22
    Location:
    Hinckley
    Ratings:
    +41 / 1 / -0
    I collected my car yesterday evening, in the dark. Checked it today in daylight and this time they've made a superb job of matching the colour. They even touched up a small scratch on the bumper for me (I managed to reverse into a storage box!). Their previous attempt looked like an obvious repair but now it's practically undiscernable. Here's hoping that the blisters don't come back in a year's time. I'll keep a close eye on it before the 12 months are up!
     
    • Like Like x 4

Share This Page