I work in car workshop and sometimes we stick those carbon-like stickers on car parts, and sometimes I use it to cover other things like laptop cover or speakers so after I got P9 it was a matter of time to use it on it...
I actually did that with my previous Xperias phones, but with P9 this is more tricky to use those stickers because it have rounded edges.
Here is my first test on how it would look on my phone:
As you can see I skipped upper part of phone, because i didnt had in home scalpel that is needed to cut such small parts. Also its first test, so edges aren't perfect.
Later I will get scalpel from work and I will try to cut it properly.
As for actual materials, we use those cheap stickers that you can buy in packs of 1x3m, they cost less than 5 Euro. Rest it standard: hair dryer, scalpel or any precision knife and ruler. That first try took me about 15 min to cut and apply.
So overall I think its better to try it by yourself before spending 10Euro on it. And even if it will not work, you still could stick it on any other device in your home
