There is hundreds of shades of white 040 super white 2 is our shade people think our shade is laquered but it's not. You will never get an exact match because bumper plastic is a different texture to metal as they absorb different. The silver will have to be taken off all reprimed again. They body or paint shop will have a colour swatch wait for a sunny day after a polish to go see what they can do. Also white paint should be a stirred mix and not shaken. It's a delicate process!