How to tint Honda Civic new shape lower back screen

Hi, I have had a request to tint a new shape Honda Civic. I need some tips on how to heat shrink the lower part of the back screen without melting it as it is made out of plastic. I have also been told about some kind of spray tint, is it any good?

Thanks

Dont tint it, the film wont last. Just leave it, with the upper part done its not that noticeable

i have tinted loads of these and have never touched that plastic window, not worth wrecking it, same as merc c-class coupe

Thanks for that, will not be touching that lower back screen!