From experience that happened by wasting money..it sticks ..but is as strong as spray paint
The shade that is attained (black or NATO green) is non-reflective which is very important for security force action. The coating withstands chemical warfare materials. The Black-T coating can be applied to different types of materials including steel, aluminum, brass, magnesium, titanium, plastic materials, and compound materials.
Also it distorts some plastics. Found out the hard way on that one too