Its not somat you can do yourself realy though. Where I used to work had one of the digital print and cut machines........£18000!
and that was almost a base model.
The full size jobs are done on a special p**s thin vinyl, so that it fits contours of cars when it is warmed up. Its propper impressive and has to be done in a dust free environment thats temperature controlled.
r/c wise, it could be done on normal vinyl unless you want a propper job that covers the whole car with very little joins in it.
But yes it could be done.