Hi Peter, thanks for your reply to my post, I never thought of the bonnet or boot being made of aluminium, I have been out this morning with a magnet and you are right the bonnet is not magnetic so assume it's Ali but the boot is magnetic so must be steel, the paint on the front of the bonnet is blistering as if it is rust coming through, I don't know how long Jaguars paint warranty is so will have to contact the dealer to see what can be done. Regards Andrew