You will here a thousand no's before you will a yes. You want to do your home work about the company first, as far as what YOU can offer to the company in return of a sponsorship deal. And you want to try to get your name out there so do what ever you can to promote yourself. I myself have been looking for sponsorship for Arca and possably the Camping World Truck Series. It is not an easy task with out knowing some one that knows a buisness owner. But so far all the info I have read in this topic is very usefull, and honest. With the economic chalenges we all face sponsorship is going to be hrder to find. Good luck.