Lotus Elan

Micro blisters ggrrrr

PostPost by: Burton4130 » Wed Dec 05, 2018 2:24 pm

Hello

Iam a new member/owner and have a plus2 which has micro blisters on every single panel of the car... the car has always been kept in a carcoon and ive read that this may be a cause of such a thing?
The car is still in a bubble but due to the extent of a repair, if the car was to be rubbed down for respray, id want to be sure not to cause the same effect in the future.

has anyone else ran into this problem? and if it was sorted was it a very expensive procedure?

Cheers Russell
Burton4130
First Gear
First Gear
 
Posts: 18
Joined: 11 Oct 2018
Location: Scotland

PostPost by: nmauduit » Wed Dec 05, 2018 3:27 pm

You can do a search on fiberglass osmosis to get a feel for the various approaches, but if you want to cure the cause and not the symptom temporarily this is an extensive work.
S4SE 36/8198
User avatar
nmauduit
Fourth Gear
Fourth Gear
 
Posts: 980
Joined: 02 Sep 2013
Location: France

PostPost by: gus » Wed Dec 05, 2018 3:51 pm

Yeah, it is basically getting in from the back, unless there was a problem with the painting
gus
Fourth Gear
Fourth Gear
 
Posts: 573
Joined: 05 May 2011

PostPost by: Burton4130 » Wed Dec 05, 2018 4:22 pm

so the thinking is, that the paint or fibreglass hasnt been sealed properly?
Its original paint... and its is covered from tip to tip in micro blisters, its like lizard skin lol

cheers Russell
Burton4130
First Gear
First Gear
 
Posts: 18
Joined: 11 Oct 2018
Location: Scotland

PostPost by: Mick6186 » Wed Dec 05, 2018 4:35 pm

I had micro blisters on some of the panels on my car that had been painted in the 1980's and when I rubbed the area down there was no sign of any blistering or pitting on the surface once the paint had been removed. I believe the blistering had been caused by poor preparation of the old respray, possibly not letting the surface dry completely before spraying. When I prepared the body to respray I did not use any water such as wet or dry abrasives, and so far 18 months with no sign of blisters returning on the cellulose finish(early days!!),
Mick
Mick6186
Second Gear
Second Gear
 
Posts: 186
Joined: 11 Mar 2014
Location: Gravesend

PostPost by: RichC » Wed Dec 05, 2018 4:37 pm

poorly prepped !. Could be someone unused to GRP resprays has prepped using wet n dry paper and a bucket of soapy water ( as they did back in the day ) and not baked out the water before painting :roll:
User avatar
RichC
Fourth Gear
Fourth Gear
 
Posts: 839
Joined: 28 Apr 2009
Location: Tendring Essex

PostPost by: RichC » Wed Dec 05, 2018 4:38 pm

@Mick SNAP !
User avatar
RichC
Fourth Gear
Fourth Gear
 
Posts: 839
Joined: 28 Apr 2009
Location: Tendring Essex

PostPost by: RichC » Wed Dec 05, 2018 4:40 pm

@Russell ...or you could just learn to love your lizard skin patina
User avatar
RichC
Fourth Gear
Fourth Gear
 
Posts: 839
Joined: 28 Apr 2009
Location: Tendring Essex

PostPost by: Donels » Wed Dec 05, 2018 4:53 pm

Here are some pics of my blistered paint. As you can see it's quite serious. It has been painted several times and I have removed 10 layers of paint. The blistering goes back to a filler coat applied two colours ago and when you burst a blister a brown substance emerges. I think its a reaction between the different paints that have been applied. The earlier paint was cellulose and later paints are two pack, so your blistering may not be just osmosis but may something similar. The only solution is to remove it all and start again.

img_7099.jpg and

img_0510.jpg and
Elan +2
Elise mk 1
Donels
Second Gear
Second Gear
 
Posts: 115
Joined: 10 Sep 2016
Location: Tamworth

PostPost by: gus » Wed Dec 05, 2018 5:47 pm

Well, that is just bad painting, cannot make any judgements as to cause with that much paint on it

I stripped my car to gel and repainted with acrylic urethane and got some many tiny blisters on the front quarters forward of the tires. and a few on the drivers door

all after several years
gus
Fourth Gear
Fourth Gear
 
Posts: 573
Joined: 05 May 2011

PostPost by: gus » Wed Dec 05, 2018 5:59 pm

Burton4130 wrote:so the thinking is, that the paint or fibreglass hasnt been sealed properly?
Its original paint... and its is covered from tip to tip in micro blisters, its like lizard skin lol

cheers Russell


Original paint has in fact exceeded its expected lifespan.....
gus
Fourth Gear
Fourth Gear
 
Posts: 573
Joined: 05 May 2011

PostPost by: HAIRY » Wed Dec 05, 2018 6:32 pm

Condensation in the compressor?
HAIRY
Second Gear
Second Gear
 
Posts: 59
Joined: 14 Sep 2015
Location: Wales

PostPost by: Grizzly » Wed Dec 05, 2018 7:21 pm

There are many reasons you get blisters like that....... If it was fresh (paint job under two years old) i'd say moisture contamination but if it's old and only recently gone like that then it's mosture / Osmosis damage.

That looks nasty and from past experience you get blisters like that when it's not been ground sealed, then some one has used reface over the car as high build (polyester spray filler) was very common back in the day but is very porous so acts like a sponge if you put it over a porous GRP shell, so once it's full of moisture you only get one decent freeze for it to start lifting the paint.

Carcoon's are usually good as long as you put the car in on a nice warm day, if you leave it until winter has closed in you need to dehumidify it or your defeating the object.
Chris
User avatar
Grizzly
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1909
Joined: 13 Jun 2010
Location: Cheshire/UK

PostPost by: Donels » Wed Dec 05, 2018 7:45 pm

I think you're probably right with my problem. There is actually 3 colour changes but the last two have a thick layer of sprayed filler with what looks like a sealing coat beneath that. In places where there is only one paint change the blisters go through to the grp. Otherwise it goes through the next paint change through the filler layer and stops at the sealing layer.
Elan +2
Elise mk 1
Donels
Second Gear
Second Gear
 
Posts: 115
Joined: 10 Sep 2016
Location: Tamworth

PostPost by: Burton4130 » Thu Dec 06, 2018 8:46 am

Thanks Guys!

Its not had paint in at least, the last 20yrs and the micro blisters have multiplied over the last decade without reason.

I thought the whole reason for using the carcoon was to slowly allow a vehicle to dry and then maintain or slow down the changes in temperature within the bubble, thus reducing condensation etc?

I think you may be right... i need to embrace the inner lizard and love it in its unoriginal/original flava... 8)

who else uses a carcoon?
Burton4130
First Gear
First Gear
 
Posts: 18
Joined: 11 Oct 2018
Location: Scotland
Next

Total Online:

Users browsing this forum: Keith Scarfe, wotsisname and 14 guests