LOL, its a BIT more complicated than that...
it's more like (but not exactly like) this:
sand (100 grit) down to bare metal
fill up any holes, dents, dimples etc with car body filler
sand (200, 400, 600) til metal surface is nice and smooth (ie, no big dents or scratches etc)
thin primer coat
thin primer coat
sand (600, 800)
thin primer coat
thin primer coat
sand (800)
thin colour coat
thin colour coat
sand (1200)
thin colour coat
thin colour coat
sand (1500)
thin colour coat
thin colour coat
sand (2000)
thin clear coat
thin clear coat
there are MANY guides on the net... basically, i'd do it pretty similar to above... the key is to prep the metal and PRIME it properly, add many thin coats of colour, sanding in between as necessary, and adding a clear coat at the end...
you could clear coat a bare metal case... just google for shiny shuttle cases and find many shiny toaster-like looking cases