OLDOILER,
I was quoted £100 by my local graphics guy to do my bonnet in 3M Carbon Fibre Wrap, guaranteed for 6 years as well.
He did say, if there are any stone chips on the bonnet that I would need to touch these in with paint or primer in order to leave the surface level as the vinyl would 'sink' into the chips and you would see the outline of the chips on top of the vinyl if you get what I mean.