Hi all!

I am new in this forum and also in Fiberglass part making!
 Today I did apply first time gel coat on my project hood! and gel coat did wrinkle up in some areas!

Hood is clear coated, polished and waxed many times with easycomposites.co.uk mold release wax.

Gel coat is mixed with 2% of hardener!

Just seen your update here.  It looks from those last pics that - apart from needing to try another epoxy die sealer, you need to do a little more work with car bog to get your die smoother.  That is unless that ribbed effect in your bonnet is what you're after.  Your problem definitely lies in die preparation & sealing.