I have a black Nissan Sentra and it has a little shine to it, but not like others. I've tried using mcguire and turtle wax to bring about more shine to it but I can never get that really fresh clear shine. I know some people say to use wax but that stuff is expensive. It's a recession and I'm trying to save as much as I can. Anyone know of any cheap good products that work like at walmart or something?