Hardness
Especially when you know that this coatings’ – origin needs to be flexible to follow all the 3D – surfaces (on a micro – level) that your paint truly is to make sure all parts of your paint are really coated. 8H is not the hardest coating, in our perspective you don’t need more; this is a perfect result to make weak paints strong, for example to protect paint against scratches and marring from everyday use, road grime and bugsquash.