I have recently purchased the 1mm Sheet Wax and every time I try to produce a mould using this product it comes out with pinholes and surface imperfections as seen in the photo below, (I do make sure not to cause any damage, or unnecessary holes when laying it), plus, the wax is sticky and hard to remove. Any idea as to why? 

I have been using Tooling Gelcoat and Polyester Resin for Fiberglass Reinforcement.

I have also been following the proper steps as seen in the video.