I have in the past used Marbocote fastcote. It gave a pretty good finish, about 95% of the mould finish and released well. The problem with it was that I have some trimming off of the edges to do, and where the knife and chisel was used to trim off, the release agent would abrade by the tool sliding over the surface. When the moulds were joined, there would be a tendancy for the flanges to adhere to the joining resin that migrated out a little. This would stick up a bit and take off small portions of the edge of the mould. Not much but enough to degrade the join seam over time.

Wax seems a little more resiliant to this? I have mitigated the problem a little, but it's still a risk if the Easylease is easily abraded away by the trimming?

Another question, what happens to the GC50 if you theoretically brush it on to Easylease rather than spray it? Would it still creep back and fish eye like wax?

Easy-Lease.  I use Easy-Lease and GC50. As long as you spray (which you say you are) not brushing the GC50 you won't have a problem. One coat of GC50 (0.2-0.4mm) is sufficient. Easy- Lease will also give you a "as good as the mould" surface finish.

Carbon Copies Ltd

I'm using GC50 and when the part is finished it's an excellent product!

However, I spray the GC50, and often find that when it's on the mould it suffers a lot from Fisheyeing. A fairly classic paint reaction problem to silicones in the automotive paint world. I find that the second pass of the spraygun often covers most of them up, and a third usually eliminates them, but occasionally there are always a few left over which can sometimes show on the finished part depending on the colour.

I use Meguiars number 8 and TR systems regular waxes. They both exhibit this. Some years back I used an American Product called "Dolphin wax" and it was very good at being neutral, no fisheyes or creep-back from edges and it released very well. They won't ship to the UK any more though!

Does anyone have any recommendation for a release agent that will minimise this? I don't use PVA before anyone asks as I cannot get the finish from the moulds using it.

Many thanks.