I am having a problem with GC50 and shrinkage.
I've noticed shrinkage before in sharp right -angled corners, where the gelcoat has pulled away and out from the corner, often following one surface or the other leaving a void one side. Sometimes a bigger void one side and a smaller the other.

This time I have seen a fairly large shrinkage, shown below. I gave a thicker than normal coat of Sprayed GC50, with 15% white Polyester pigment, 3% styrene 2.5% MEKP
This piece is scrap obviously, and I've had to strip it out and start again.

I am using a gravity fed spraygun, with a 1.8mm nozzle. It's not a gel coat specific gun but does the job for me as the part is not huge. I would have thought that the gel coat gun would have provided a thicker layer anyway?

The mould is very well seasoned now, and I use TR regular wax only.

Any thoughts? This is probably the one problem I have with GC50, in all other aspects it suits me perfectly. I'd like to get on top of this, otherwise it's back yet agin to finding a epoxy compatible poletser gel coat!