I tried clicking the links for the cars you provided, but the links didn't seem to be working.  I found this car on the same website, and thought with all the orange in the background it would be a challenge!  I wasn't sure what to do about the reflection of the rims (more of the ground? Any surround influence from the purple?) and the back of the stand with what I assume has information about the car (on the right side of the hood).  I almost forgot the light in front of the front tire.  Overall, this was fun! I had heard the term "mask" a LOT, but never quite understood it for some reason.  This lesson made it crystal clear.  THANK YOU!