Shading film on Perspex windows

Sorry to say that I don't think this is an easy one to solve. The main problem is that I don't think the outer surface of either the roof light or the side windows is very flat. The vinyl tint film usually used for that purpose has a small amount of stretch, and good fitters can work wonders, but I think that might defeat even the most experienced.

The other issue that I've heard about is the adhesive on the back of the tint film adversely affecting the acrylic plastic. I don't know whether that problem has been solved (or indeed whether it ever was a major problem), but it might be worth a call to one of the companies that advertise car window tinting? Though I concede that most will probably have very little experience of putting tints on acrylic!