Alright... Quit watching youtube and get out there and get it mounted! 






You could sink those cross bars that the spare is on by half the width of the tire....???
or mount the tire on the bottom side of the crossbars?

Plastic didn't look all that bad - has that been polished up? If so, what did you use?

You going to run a clear coat over the plastic for UV protection? People here polish their headlights and within 2-3 months they're yellowed up if no UV coating.
I've clearcoated headlights that I've sanded. Turned out great.