Thanks gents,
I have a couple of Axminster blanks which I'll have a go on before splashing the cash, - and it certainly looks as if I should steer clear of polyester, initially at least.
I have turned a piece of, what sounds like acrylic, to make a small mushroom and found it easy enough but I didn't want to use the acrylic pen blanks on the "practice" slimline pens that I've got - I'll use wood on those.
I can't post pictures yet but will try and do so once I get going; probably not until next week though.
Duncan