what do i do with cracks in my mould

I think its because i had to be a bit aggressive getting the mould of the roof

There are also some very fine cracks which the camera wouldnt pick up

How do i fix them as it was an expensive mould and i dont want to scrap it

Hi Daz,

Joe has got it about spot-on... the method we have used in the past, normally due to a dropped mould, is to dig out the length of the crack with a dremel bleed in some gel-coat and cover it with release film, (Joes foil method sounds great though) after curing it's a case of sanding it flat and polishing it, there's no quicker way than this, that I am aware of. 

The only thing worth pointing out is that you should not ever have to force something from the mould, with properly prepared moulds/patterns the release should never take any real effort, if you are hearing bangs creaks and cracks when you are releasing, or it takes longer than a minute then you need to address your surface preparation, from painted patterns we use easylease followed by release wax, for the moulds we just apply easylease, using this system we have produced hundreds of moulds and thousands of components and never had a 'sticker' getting your release right is something that will make everything a bit less stressful!

Paul Statham
Easy Composites / Carbon Mods - Technical