Board Thread:Game Discussion/@comment-1.9.106.220-20170820141742/@comment-31567784-20170820160222

And to answer yor question, all skins become availiable to you once you fully upgrade the car. :-) Sometimes you can buy the customzation items like colors and decals for R$ and that is what I usually do to make some use of my otherwhise useless R$. I don't spend any gold on customizations and wait till I can get them for R$ or when I fully upgrade the car.