I got some new wheels caps and new set of Pirelli P-Zero tires. Should I plastic dip the wheels black or leave them alone?

Here is what the car looked before the cap and tires.



This is what it looks like now.

 

Plasti dip will give you a good idea of how they would look black but I'm not sure about the durability for long term. Anyway I think your car looks good either way.

 

these days everyone is dipping. so it would be unique to leave as is.