Thanks for all the replies guys, I will get the panels bent as close as I can, clean everything thoroughly and then clamp it all up for a couple of days to make sure it is all dry. Thanks Ronnie for the offer of coming round and sitting on it but given Andy's comments about how well it sticks to skin I am not sure this is a good idea.
I was thinking of some sort of bonnet ornament but perhaps something slightly more subtle than a large bloke would be more appropriate:-) Besides I can't afford to feed you and I'm sure the IVA inspector would have sarcastic comment to make about vision being obscured. Do you have any sharp projections? On second thoughts, don't answer that
Enoch.