Do they say what vacuum pressure they are using.
No peel ply?
https://www.youtube.com/watch?v=sdcB5h1Remc
It’s infusion so vacuum is not constant, just what allow resin to be suck. It’s a specific polyester resin for infusion that kick with uv. No peel ply, resin drain, board need sand and finish resin. I see this video some years ago, it’s not deveopped then from what i know but other claim they make their boards by infusion here.