Thx for the infos ! i dont know if the gorilla glass is that good, i usually destroy one smartphone screen every quarter.

For the polycarbonate it seems that things have evolved because on the GT3 RS or on the cayman clubsport, i have no issue of scratches. I do remember rally sseing rally cars with very scratched windows.

@My parents use to have a outside pool also made of this plastic glasses, i was 12 when one day my dad asked me to wash these windows. he didnt told me how to do it but i thought that scotch brit sponge would make the job.  He could follow one by one each of my circle on the windows :) 

Shalk is awesome but for me it's doesnt show well the nice curve of the car. Black the same.