paint help

[INFERNAL PREDATOR]

i just made a greek helmet out of cardboard and i am gonna spray paint it chrome
what should i put on the cardboard before i spray paint it so it will have a shiny metal look?

 

[Predkid]

i just made a greek helmet out of cardboard and i am gonna spray paint it chrome
what should i put on the cardboard before i spray paint it so it will have a shiny metal look?

first do an undercoat of primer and then spray your chrome and then spray a little bit of silver and rub it all over the helmet.