I have been making laminates using Linnen material and EC laminating epoxy and it works OK.  I do a hand layup and the squeeze out the excess resin in a press.  The thickness is 25mm and the max size about 200mm x 50mm

Thanks Warren.

From what I've seen (but not tried yet) Polyurethane resins react more to impurities, water, wood etc creating bubbles within the resin so it would not be suitable for lamination.

I'm looking at casting sections of pure PU for my next project but from others experiences it has to be 2-5min cure to prevent the bubbles forming, i.e. it has to cure before it has time to react