My brother has a connection with someone who owns a car audio and performance shop. I am toying with the idea of calling him up and telling him he can use my car to create a marketing piece. How do I sell him on this idea? What benefits do I suggest to him? Any negatives on my end?

 

If you really want a sponsor then you need to approach it like a business deal and write a sponsor proposal. Spell out the terms as you see them, the benefits to the sponsor, how your association will provide those benefits.

Be professional, be honest, be ready for rejection

Best of luck.