Sounds like this is going to be for nose protection? Instead of the expense of a film, chances of it yellowing, finding someone to apply it and difficulty in getting it off have you considered PlastiCoat? Goes on easy and can be removed if desired.
Had my 289 FIA covered in the front and rear wheel arches with Expel. Expel I believe is a newer technology that resists yellowing like 3m will do over the years. Make sure to find someone that is well skilled with its application as the amount of lines can be minimized even though Cobras have a lot of curves and roundness in the front.
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Sherm1 
Protective coating
Hybrid Mode
