Paint Question

Hi all,
I've never exactly repainted a figure before, however, this one irks me enough that I want to go through with it.
I personally believe that on Leader Class Prime, all the gray seen in his truck mode (the grill, the rims, the gas tank, the head visor, but mostly the darn grill) should be silver!
What paint would I use to do this, and should I do it in the first place?
Thanks!
I've never exactly repainted a figure before, however, this one irks me enough that I want to go through with it.
I personally believe that on Leader Class Prime, all the gray seen in his truck mode (the grill, the rims, the gas tank, the head visor, but mostly the darn grill) should be silver!
What paint would I use to do this, and should I do it in the first place?
Thanks!