starting out again

A few weeks ago I introduced myself to the board, saying I was thinking come this spring that I would add auto detailing to my current business of pressure and window washing. I have had some regular customers inquire about this with me. As I said I did do detailing a number of years ago but sold most of if not all of my equipment. Looking into purchasing some good chemicals to start this endeaver, any suggestions. I do not believe I'm going to need a ton of chemicals as I do not believe that I will be getting a lot of work, since most of it will come through current customers.