Why is this happening .
I used pro finish carbon
Sprayed the mold with the gc50
Left over night to cure !!!
what can I do to rectify the delaminaton problem

Morning , I've used GC50 before and had pre release problems , the only way I found to get over it was spraying a really dusty coat of gel coat in the mould , really dry and dusty . If applied in a normal way as to get a wet finish I would get the pre release
Hope this helps