On 16/07/2020 10:24, Andy Burns wrote:
Smolley wrote:

Where could I get a piece of bent plywood

Normal plywood is very rigid because the grain direction of each layer
alternates within it, therefore it won't bend after it's manufactured.

You can get "bendy ply" and then glue/laminate several layers of it into
any reasonable shape, but you'll need plenty of clamps and asuitable
former ...

get some insulation foam - high density underfloor - and carve a former
using saws, wire brush and sanding paper

cover it with clingfilm stretched tight, and then use several layers of
heavy glass cloth and polyester resin to make a fibreglass armresty

Or buy a chair that is the right shape?

--
€œIdeas are inherently conservative. They yield not to the attack of
other ideas but to the massive onslaught of circumstance"

- John K Galbraith