I would defiantly go for a full bonnets, I looked into this
film in great detail, even traveling to a showroom in London that had cars with it on, I suppose it depends on how fussy you are, but to me it was still clearly visible and not what I would put up with. I decide against it as I only cover 4k miles a year and very little motorway driving and if I was unlucky enough to get so many stone chips on my bumper and bonnet it would have been the same cost to have the bonnet and bumper re sprayed. It also depends on how long you intend to keep the car for, if it’s going to be a long time then the cost of multi re sprays would end up more then the film. I would have a look your self before having it done.