if you scuff it with wet sand paper the paint will get DULL... after that u have to use polisher compound. If the paint is too thin u have to be careful with the sanding.

Like for example meguiars hand polish #81 or a 3m one that is called almost the same way

THe meguiars product is pretty good but read the instructions, If you don't want to sand probably u will need to use the meguiars clay 1st then the polisher

Good luck.