Hi
Im currently making a large foam mould for uses as a nose cone for a small single seat racing car.  

We have used Easy Composites Low Density polyurethane foam to fill in gaps between our MDF skeletal frame.
I would like to make sure that I have the process correct for creating the mould as I only have one shot at this.

For the Plug once sanded body filled and completely finished i'll paint on a layer of EG60 Epoxy tooling gelcoat and allow this to fully cure, then apply at least 6 layers of the Easy-Lease Chemical release agent, followed by at least 2 layers of mirror glaze mould release wax. 

Then im using 4 layers of 100gsm CSM fibre glass to create the mould from which I can infuse upon.

Is this process correct or is there anywhere I should make alterations please let me know.

Thanks
Charlie

You mention using 4 layers of CSM but what gelcoat are you going to use for the surface of the mould itself? In addition, 4 layers of 100g is quite thin and won't make for a substantial mould; its may be fine for a couple of pulls but if you were intending to make more, I would consider bulking up the thickness of the tool itself.