Hello,
Marketing - Important to the customer is your image. A professional image makes a future customer feel save, in giving you their work to do. To find the new customer you must open many doors by - ADs; Fliers; Talking at WI meetings etc. Subject looking after your drive and patio is cost affective.
Chemicals. Talk to your supplier because there are many substances on the market for different surface cleaning. A little time talking to the supplier will save you money and time.
Kind regards
Christopher.