Tiercel - is flow coat definitely what you mean? Have you done this successfully yourself? I ask because I'm just about to make a new hutch and remember reading this post a while back and planned to do the same - sterling board ('cos cheaper than marine ply) covered with flow coat. This afternoon I rang a supplier to get the flow coat and they said that it's supposed to be used on fibreglass and that although in theory you can apply it to timber, within a couple of months it will just start peeling off.
So is it possible the stuff you're referring to isn't flow coat but something else? Or