Hi, I have been asked to make an item in carbon but the guy already has the mould. However, the mould is made from polyester so how can i protect his mould?

My moulds are polyester gelcoat with vinilester tooling resin from unimould system of ec.

I use 8 layers of easylease and 2x wax on top on the first pull.   Then i just wax it every pull.

Im using epoxy resin to make my parts.