I did not wrap around the back as the 2mm fibreglass board gave a natural finish in keeping with what I'd expect to see and in my boat is unobservable in any case as my panels are recessed. The vinyl is quite stiff and card like given it's thickness and you would not be able to wrap it round the back without use of heat. I imagine it is easily done, just in my instance it did not warrant it, nor am I fortunate enough to live in sunny and hot climes where the adhesive may slip in the summer sun being UK based. That would be my only concern if you are Gulf based or similar and then I would wrap it around the edges. The adhesive is good though, I had to revisit one panel which I wasn't too happy with after a couple weeks, it stuck like dried porridge to a spoon!