I am having finish issues on my pattern and mould when using Unimold gelcoat. The first time the part was finished in clear lacquer form Halfords. The part was easy leased and then waxed 8 times. When de-moulded the finish on the part had alligatored leaving a poor quality mould. The second time had 2k lacquer finish, again easy lease and wax with the same result.

I have to agree with Warren here.  PVA seems the best way to go as time is critical in your case.  In an ideal world, aim for a perfect plug leaving minimal work to achieve a perfect mould.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant