Thanks, Bruce, for the lenghthy and detailed reply, much
appriciated

I need to work out which product to go with I suppose. I was looking
at this on eBay:

http://cgi.ebay.co.uk/Epoxy-Resin-Ha...item334f06460f

How suitable would that be for my application? If not, that seller has
a "resin shop", can you see anything in his shop that would do the
job? Or if i go with a gelcaot, he has that too:

http://stores.shop.ebay.co.uk/resinshop__W0QQ_armrsZ1

Thanks again