I am going to make kiteboard.
As core I have 8mm plywood and I want to cover it with fiberglass.

Question is if it may be possible to make it in one shot. I found video where is shown infusion of kiteboard but it is not told if it have been done with one shot.
https://www.youtube.com/watch?v=7NFdIi9CJ_M
With such small distances do I still need resin spreading mat?

Another question is if it is better to apply one thick layer of fiberglass or two thinner layers?