car covers & micro blistering
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jamieandthemagic

Original Poster:

629 posts

215 months

Thursday 8th September 2011
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Anyone got advice or experience with car covers & micro blistering ?

I kept my 71 GT Junior in a lock up last winter (single garage type, with a internal car cover over it (a genuine alfa showroom one). But it appears to have micro blistering along the swaglines of the car now, which were never there before.

Is this down to having any type of cover on the car in a non heated garage, or would a breathable car cover have prevented this ?

dartissimus

951 posts

197 months

Friday 9th September 2011
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Jamie,
I've heard of microblistering going away if the car was put into a low bake oven for 24 hours. I'd like to see it to believe it.
It turns a good car into a good 6 foot car, i.e. good from more than six feet away.
My Daimler SP250 has blistering, althou I'm told that Daimler used to rub down the fibreglass wet in the factory, so the moisture coming out is from the original build, not from impurities in the paint. The only consolation is that I'm no longer worried about the paintwork so it's a driving car not a looking car unless it gets a £5k gel coat respray; not in my ownership it won't.
Regarding breathable covers, would you want to risk it on a good car?

chard

28,630 posts

206 months

Friday 9th September 2011
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All a cover does is keep the dust off the car in the garage. Better to let air circulate. Mine was binned as soon as I noticed condensation underneath.

davepoth

29,395 posts

222 months

Friday 9th September 2011
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Yup - if a car of mine was in a garage I might suspend a sheet over it to stop the dust dropping but getting the air to it is very important.

bigblock

782 posts

221 months

Friday 9th September 2011
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I am not exactly sure how micro-blistering occurs. All I know is that after a cold winter in a rather damp garage covered in a non-breathable car cover there were micro-blisters all over the bodywork.

I had assumed that it was moisture in the gelcoat freezing and forming bubbles under the paint. If I burst the blisters there is some form of liquid underneath. I would be interested to try the "bake in oven" theory, otherwise it is a full re-spray.