I post cured the mould as stated on spec sheet.

Yes you can repair the moulds by by sanding and cleaning out the damaged area then apply some new gel coat with a wax additive https://www.easycomposites.co.uk/solution-mw-wax-gelcoat-additive then wet and dry the damaged area and give it a final polish. A semi perm release like Easylease does not need a coat of wax and when used correctly the part will come out of the mould with very little effort in fact when I am removing the infusion mesh the part usually pulls out of the mould.

In terms of repair, on areas small enough, you could fill with gelcoat after prepping the damaged areas and cover with some 'plasters' made of flash tape stuck to itself, so the none-sticky side faces down. More tape at the edges to create an airtight seal should negate the need for wax additive and, if smoothed over the repair carefully, leave a surface that's just proud of the hole you've filled.