This has been discussed at length on here before. To give you my 2p's worth, when I bought my 2011 Evora, back in December 2016, the headlights had been re-coated. The car is kept garaged, except for the odd week at the seaside in the summer and days out. After three years the film/lacquer started cracking and flaking and a year later I sanded them down properly and fitted the clear film as supplied by aliath.co.uk without re-coating them. To date, all is fine and they look as good as when I did them. The key to all this, as I see it, is that the lacquer/coating that everyone, including Lotus, use is absolutely fine on clear plexiglass. The Evora has areas of the lense that are black, ie, the top and the edges. I reckon that it is the thermal expansion differential in sunlight, between the clear and black that causes the problem, or that the lacquer/coating is not suitable for using on black areas. I have seen this on several Evoras, the flaking always starts at the top and sides. In the future, if I am correct, then I would expect to see the film I have fitted start to mist in areas that are losing their adhesion or, hopefully, due to the flexibility of the clear film, this will not be an issue. I will update if and when I have any issues. Meanwhile, I would recommend using the film (which does offer UV protection) and forgetting about using lacquer or clear coating.