Not sure what yours is made from but I have used this product before, not on a roof, but don’t see why it wouldn’t work?
Captain Tolley's - Find and Fix Leaks. Formerly Creeping Crack Cure
Captain Tolley's - Find and Fix Leaks. Formerly Creeping Crack Cure
We see this kind of cracking in my industry a lot. (Caravans and Motorhomes)
It normally originates from a single source like a screw hole or even a defect in the fibreglass where there's a weak spot, and works it's way across a panel over time.
There is a famous case of a certain big Caravan manufacture and a Caravan cleaning product that was blamed for rear panels cracking. This was taken to court and an investigation proved that it was nothing to do with the cleaning product. It was where the manufacture were drilling pilot holes for screws, but the holes weren't big enough, meaning each time the screws were tightened, they stretched the pilot hole and cracked the panels slightly. This then led to the cracks getting bigger as the Caravans were being towed and flexed around.
Why did the manufacture blame the cleaning product? Simply because they went back to all the owners of the damaged Caravans and asked a list of questions, including what they'd used to clean their Caravans, and as this product was and still is the most popular Caravan cleaning product in the industry, the owners kept repeating this product name, thus the Caravan manufacture thinking this was the cause of the issue because it was the only consistent answer.
That is seriously not funny. Hope you find a good solution to it. 
Sorry to hear of your troubles......just checked with the wife ...time served boat repair and maintenance...worked on fibreglass for years...simple answer it can be repaired ,she says any good motorcycle repairers or marine trade outlets ( it’s there bread and butter repairing damaged fairings etc)
Ps ....is it under warranty
Ps ....is it under warranty
Ok thank you it’s a start
Interesting thank you
Hi not under warranty. Ihave being thinking along those lines so good to know thanks
Hi it’s a skyline pop top and crank is just behind the hinge in the centre it van between the wheels thanks
Looks like impact damage to me - the fibreglass flexes but the paint cracks. ( or gel coat cracks if the pigment is in the gelcoat ) See it all the time in dinghies that are lightly laid up like pop tops. Possibly caused by the roof being shut down onto some obstruction?
Is there a way of repairing the gel coat ?, filler or touch up , something like that?, It can’t be seen very well from the pictures but there is a small puncture as well as the marbling.
Thanks
You could try this for the cracks MagicEzy Hairline Fix Gelcoat Repair Sealant | Force 4 Chandlery A choice of royal blue or navy for your colour. I am not sure about the hole though.
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