In reply to KingStapo:
> Saw some wooden bath tubs on the internet, don't fancy paying £3k for one and reckon i could knock one up myself with the right construction and some boat varnish.
> Good idea/bad idea?
Great idea if you actually want to do the research and work at least as much as have the finished product. It doesn't look too difficult but it'd be a messy and slow project.
Finding a resin that doesn't soften in hot water might require some care especially if it sees heavy use as a shower tray. Marine varnish or a UV stable infusion epoxy with a high temperature rating would both likely work.
Also making sure the wood is all at the same stage of drying and in equilibrium with your bathroom humidity could be pretty time consuming. It'd be a real pain in the arse (possibly literally!) having to repair splits as it gains/loses moisture and moves.
jk