Something I know about! I shoot these guys all day everyday....my rule of thumb is this, the photo is sold NEVER given (for future ref for you) and your logo or business name ON the photo, this is huge because if he or someone else likes what they see and ask who shot it, you dont want "oh some guy in KC" as the answer. The other thing I do is I ask for the finished product for my portfolio. I have never had anyone, racer or sponsor say no. Let me know if you have anymore questions...........pleaseeeeeeeeeeee dont give yoru work away though!