Front grill is dull, needs color to be restored

On my white 09 Tacom the white plastic part of the grill is dull, needs color back. I've tried waxing this part, washing it real good but it's still dull. What do i need to bring the color back?

 

cut and buff it

 

anybody have experience with the back to black stuff? wonder if that would work for you

 

I bouighyt it, used it on all exterior black trim, bed rails, step pad on bumper, step pad on step bar, mud flaps. It makes a big difference, very easy to apply, a little goes a long ways. Water beads up on it, it stays on. I highly recommend it.