I've created a few parts now.. I used the easylease chemical release agent 5 applications. . During layup and while curing under vacuum I get a thin film of epoxy curing on the flanges. I clean what I can using malt vinegar during layout but there is still some spread during vacuum. When releasing the part this dried epoxy  remains on the mould flanges and I have to remove it manually. It hasn't adhered completely to the mould in most places. But in a few no amount of co-ersion with a wooden part or steel blade will get it off. As a result I'm scratching the mould surface while cleaning this off and i'm reducing the life of my mould a lot.