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jaykay127
Silverstone


Joined: 22 Dec 2014
Posts: 114
Location: Barrowford, Lancashire


PostPosted: Mon Dec 30, 2019 11:09 pm    Post subject: C4S suddenly got an Acne Breakout! Reply with quote

Went out to my C4S this morning to pop up to my Mum and Dads and to my horror was greeted by this....




I haven't used the care since the day before Christmas Eve and it been parked in the same place as it has been for the past 4 years. We have had no extreme weather so what can it be?

Its as though the car has hit 17 and got a bad case of Acne.

The bubbles are all over the front bumper and nowhere else.
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P0tential
Newbie


Joined: 08 Jun 2019
Posts: 28
Location: Finland


PostPosted: Tue Dec 31, 2019 7:48 am    Post subject: Reply with quote

I have the same problem, though not nearly as bad as yours, on my 1999 C4. Looks like the bumper needs a re-spray for next summer Sad
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vlad
Österreich


Joined: 16 Aug 2006
Posts: 876
Location: Berkshire


PostPosted: Tue Dec 31, 2019 8:29 am    Post subject: Reply with quote

Have you had a front end refresh recently? A poor respray can come up like this several months afterwards.
 
  
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TV8
Trainee


Joined: 08 Nov 2019
Posts: 74
Location: Bromley


PostPosted: Tue Dec 31, 2019 8:31 am    Post subject: Reply with quote

Is the car kept under a cover?
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Gray79
Silverstone


Joined: 28 Apr 2019
Posts: 130
Location: Scarborough


PostPosted: Tue Dec 31, 2019 9:07 am    Post subject: Reply with quote

It looks like it has been extremely hot and blistered the paint Dont know
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17199
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Dec 31, 2019 9:15 am    Post subject: Reply with quote

Chemical reaction after recently being resprayed.
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jaykay127
Silverstone


Joined: 22 Dec 2014
Posts: 114
Location: Barrowford, Lancashire


PostPosted: Tue Dec 31, 2019 10:47 am    Post subject: Reply with quote

It's not had a respray in the near 5 years of my ownership, it's never been kept under a cover. Over the Christmas week it has hardly been hot in Barrowford, averaging about 5 degrees daily and less at night. It's baffled me.
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coullstar
Albert Park


Joined: 15 Sep 2015
Posts: 1659
Location: Aberdeen/Torphins


PostPosted: Tue Dec 31, 2019 11:27 am    Post subject: Reply with quote

I had this recently, similar in that nothing had been done to the car. I just put it down to something having been sprayed etc or come up from the road that reacted with the paint. Repaint is only real option I was told.
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Winny911
Montreal


Joined: 13 Dec 2012
Posts: 595



PostPosted: Tue Dec 31, 2019 2:02 pm    Post subject: Reply with quote

No chance anyone else could have painted it without you knowing?

It's not unheard of for a lady to get a car repaired in secret before her husband finds out husband finds out about the damage
 
  
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stichill99
Nürburgring


Joined: 03 Nov 2013
Posts: 422
Location: Scottish Borders


PostPosted: Tue Dec 31, 2019 4:42 pm    Post subject: acne Reply with quote

I have had the exact same reaction on a bathroom wall. The wall had been painted in a bright orange mixture which looked a bit like sand and paint mixed. I stripped the wall with nitromors paint stripper about 12 years ago and last year the exact same affect has surfaced as on your car!
 
  
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nickyg63
Trainee


Joined: 25 Aug 2019
Posts: 55



PostPosted: Tue Dec 31, 2019 6:17 pm    Post subject: Reply with quote

Thats micro blistering! Its something under the paint usually moisture, i see this when people put covers on the car when wet or recent paint thats released the moisture in time. Both dont seem likely in the case of yours, however this is very unlikely to be under factory paint.

Its a case of removing and refinishing the affected areas
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7707
Location: Brighton


PostPosted: Tue Dec 31, 2019 8:00 pm    Post subject: Reply with quote

Google .. " microblisters car paint " .. the various links will explain it .

It can happen a long time after it has been painted .. and yes your PU has been painted at some point in its life .
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P9XX
Newbie


Joined: 04 Oct 2018
Posts: 35
Location: Hertfordshire


PostPosted: Tue Dec 31, 2019 9:00 pm    Post subject: Reply with quote

This type of blistering is caused by atmospheric conditions in conjunction with a probable respray on the bumper, maybe years ago. We've had a very long, wet Autumn and water vapour has permeated the paint film. This happens to a greater or lesser extent with all paints.
The last few days has seen unusually warm temperatures for the time of year and the escaping water vapour has popped the paint film off at a weak point. Weak points are normally introduced during re-sprays and not at the manufacturer (Porsche). Could be lack of sanding or leaving some contaminant on the surface before the new paint is applied.
The solution is a very thorough sanding to remove as much of the at risk paint layers as possible and then respray. New paint quality is important, go for a recognised brand at the refinisher. I could recommend a few.
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jaykay127
Silverstone


Joined: 22 Dec 2014
Posts: 114
Location: Barrowford, Lancashire


PostPosted: Tue Dec 31, 2019 9:24 pm    Post subject: Reply with quote

Thanks for the opinions guys. The bubbles are still there today but have reduced in number and size dramatically. I'll see how it goes and then when I get some other paint jobs done this summer I'll get the bumper repainted too.
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Billy Bumpsteer
Monza


Joined: 12 Aug 2019
Posts: 219



PostPosted: Wed Jan 01, 2020 11:20 am    Post subject: Reply with quote

Try heating them up with a hot air gun, carefully obviously.
 
  
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berni29
Watkins Glen


Joined: 24 Oct 2009
Posts: 2230
Location: Kent


PostPosted: Wed Jan 01, 2020 9:23 pm    Post subject: Reply with quote

Hi

This happens a lot on fibreglass cars such as Lotuses, and its water. You can actually pop the blisters with a very fine hypodermic needle and push them down if they do not go down themselves. Best done when the paint is warm.

Best of luck!

Berni
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