I am new to the business. i have all teh equipment but i'm just confused about what chemicals to use on what. I talked to a guy and he said he uses 12.5% chlorine on everything including brick, vinyl, wood, concrete, roofs,etc. what do ya'll use? i have easy access to the chlorine. what do u use on vinyl, aluminum siding, wood, concrete, brick, roofs, etc. thanks alot guys. i'm in dire need of cash and i'm ready to start.