I made a unimold of a plug today. The plug got bad and also the mold. Does anyone know what can have caused these problems? I have use both the pattern coat primer and the hi gloss on a MDF pattern. 

Yes I used a 8 month old easy lease. Applyed it with a cloth six times like I always do. 15 minutes between each and 1 hour before first layer of gel coat.  Yes i had some trouble releasing it.