On a brand new mould I usually opt for an extra coating or two of Easylease, just to be certain
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.