greg81 said:Is is the whole rear diffuser or just the ridged bit outlined in the pics? If it's the latter then I'd suggest that would be fairly easy to do. The whole diffuser would be a completely different story.
I've done quite a few homers of various trim bits and it's actually fairly simple but starts to get very tough with odd shapes and angles. As suggested above just buy a cheap length and see how it goes.
I just wrapped all my interior trim with this stuff. It's cheap but pretty good quality. Wouldn't recommend it for exterior use BUT I would recommend it for a first attempt as you won't break the bank
https://www.amazon.co.uk/gp/aw/d/B00IU9J7WK/ref=mp_s_a_1_1?ie=UTF8&qid=1503075788&sr=8-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords=carbon+vinyl+wrap&dpPl=1&dpID=51mVtg3CngL&ref=plSrch
greg81 said:You might want to wrap it in multiple pieces and cut it well so the joins can't be seen. It's not like anyone is going to be on their knees inspecting it.
If you did try it out with cheap vinyl first you'd need to do it again with a quality heat resistant product. The only other issue you have with wrapping down there is it's very close to the ground and the in turn, the elements.
Have you considered hydrodipping? Assuming the diffuser itself is removable
greg81 said:That panel I'd say from the pics would be very simple.
My tips are to have a good heat gun. A hairdryer doesn't cut it. Also cut the vinyl to the edge of the panel, don't wrap it over and round the back. A new stanley blade or some good craft knives are essential.
Alternative:. https://m.youtube.com/watch?v=pKuXyeAGzEU