While making my first mould I ran into the problem that the gelcoat was repelled so much from the Easy-Lease-covered surface that it was very hard to get the whole surface covered, once painted on the gelcoat would slowly develop bigger and bigger holes and basically pool in the lowest spot, even though that it wasn't thin at all. It took about three applications to get acceptable coverage that was still very thin in some places. I knew that it wasn't tooling gelcoat, I couldn't afford to order any right now, so I used an epoxy gelcoat that I had. Basically I guess that it just wasn't a suitable product for this application, but can I be sure that once I get a proper tooling gelcoat for future projects it will not sport the same behaviour?

Kind regards
Martin

No it likely will still occur, its a common issue with high slip chemical release agents like Easylease. You sort of have to keep brushing it until the gelcoat becomes thixotropic enough to not open up again. 

Some gelcoats are worse than others. It shouldn't be such a big issue that it is impossible to form a closed surface, it should just be something you have to pay attention to. So if your gelcoat is absolutely not working, then it probably isn't suitable. Tooling gelcoats tend to be better at resisting fisheyes as they are quite thixotropic by nature, while for example a spray gelcoat would be almost impossible to brush on well.

Thanks for your input, what you describe is basically what I did, but the gelcoat I used still produced fisheyes when it was hardly brushable anymore but after three coats I got finally rid of all of them. I think for now I have to wait and see what happens once I get another product.

Yes wax helps over the top of a chemical release. Not a massive amount, but a little bit.

Ok, I will keep that in mind anyway!

I had the same isseu with easylease. I am using the (i believe ec50 gelcoat) clear gelcoat for epoxy from easy composites.   I called there helpdesk and they gave me a perfect solution for my workpieces.

I was told to add 1 thee spoon of fumed silica each 100ml of gelcoat.
  I do 1.5 to 100ml now.    Mix it up 1 day before you use it. 
(Without the mekp)

This makes it more thixotrope and stays in place 100x better.         It was allmost perfect on the first go when i added the silica.    And you hardly see it.  (Dont over do it.. it will get cloudy when added to much)