Foil stamping is the way to go if you want shiny effects on certain elements of your artwork, such as titles, logos. Foil is stamped onto the cardboard and it does not get scratched off. Common foil color is gold (shown here is gold foil) and silver. Other custom colors are also available.

To setup foil stamp on your artwork simply create a separate layer for the foil elements and assign it a PMS color.