On dirt to daytona can you change the paint scheme/sponsorship in career mode?

Question

so can you change sponsorship/color for like 2 races

Answer 1

It depends who gives you the most money. The only color that NASCAR teams see is green

Answer 2

yes some drivers has a different sponsor each week

Answer 3

Yes there are special cars for different races.  All or most with different sponsors.   Now the owner is under contract with certain sponsors for a certain amount of time.  They can't just kick one off the hood and add another just for the heck of it.  

Hope that helps.