Reflective vinyl sticker sign for car body and window
You can choose PET or Acrylic surface reflective material, PET is rigid and it needs to be plotter cutting reflective sheeting, whereas Acrylic is more flexible, also apply by plotter cutting. Both films need to transform vinyl to transfer the words to the car body or car window. For durability, it depends on how long you want to last, if you only looking for less than 1 year, then PET is a good choice; but if you want to have it for 3 years, or more, then you have to go for acrylic reflective material.
