Where is
Andrew Yeadon when you need him?
http://andrewyeadon.com/
Study his photos, a lot of Andrew's photos are used with natural light.
Invest in real camera and a 135mm fixed 2.8 Lens always use a tripod for product photography
By the way, I am customer of exotic cars
also consider an 85mm 1.2 prime that will get your low light for sure