Serious paint damage

[KevinW]

Sorry to read this.
Same happened to a friend of mine who left some black bin bags on his Pilgrim Sumo wing a few years ago. The mositre did something and created a load of bubbling, and parts of the binbag actually stuck to the paint.

I can;t see the pic, but suspect it'll have to be rubbed down to primer at least.
If you have fully comp insurance, perhaps that might cover it?

[Bob]

Some background
My Cobra was factory built in South Africa by KCC, I bought it in about 2000 and used it for a couple of years until work took me out of the country. After retiring in 2016 it had been unused for the best part of 15 years and I had always known I would eventually put my stamp on it so I stripped and rebuilt it in 2018/19 and had it painted in 2020. It was previously in dark blue gel coat with no visible signs of cracks or other damage other than a few stone chips and grounding rash under the nose. The car was professionally painted by a local crash repair shop, I negotiated the cost and saved some money by doing some of the body prep myself and delivering the car on a trailer with the screen off, dash out, lights etc removed. I was satisfied with the result, it certainly wasn't a show car finish but I wasn't expecting one. After 2 years I had a saucer size patch of pin prick size pitting by the fuel filler, this was ground out filled and repainted by the same shop that painted it, the repair appeared to have been successful as 3 years on it had not come back. That's the background, now the current story.

I have been storing a friends single seat race car for about a year, it was in the garage behind the Cobra. In preparation for taking the race car out I moved the Cobra outside 3 or 4 days in advance and put it in front of the house under a new Halfords car cover. I have previously had the Cobra outside the garage for up to a couple of weeks under cover but significantly always directly in front of the garage in a paved yard, because of the need to get the race car past the Cobra it had to come out of the yard and in front of the house which is gravel. The race car move was delayed by a week so the Cobra stayed out because by then all of the race car spares, wheels etc were in the Cobra slot in the garage. To cut a long story short other issues plus wanting a dry day to take the cover off meant it was almost 3 weeks before I had the opportunity to put it back in the garage.

To my horror when I took the cover off, the entire inside of the car was dripping wet despite it being a new cover and no rain for a couple of days. There is extensive paint bubbling on the wing tops on all 4 wings, there are other lighter patches of smaller bubbles in other areas, the worst damage appears to be where the cover was touching the car. I'm open to advice / opinion but after calming down and thinking it over for a couple of days I think it was self inflicted. Previous experience with an older identical cover on the paved area by the garage was OK but on the gravel drive of a 200 year old house which presumably has no hard base under the gravel, the damp ground below fed moisture up into the bubble formed by the car cover where it was trapped leading to high humidity and the paint damage.
I've read as much as any other owner about fibreglass and dampness but had assumed that it was primarily the body prep and painting time that carried the risk but it appears it can happen any time given the right conditions.
Anyone storing their car over winter in a damp garage might want to ensure it's well ventilated.
I've attached a pic, that's the driver side front wing top.