"Go pro or go home. Renny Doyle teaches unique professional strategies for a successful & sustainable detailing business."
–Jason Rose, Meguiar's, Inc, Global Technical Services & Training Manager: Professional Products Division

Renny’s book should be your guide to successful solutions for everything detailing related. – Bob Eichelberg, President, Flex Polishers

Renny’s book should be the first thing you purchase, not a can of car wax.–Mike Phillips, Director of Training, Autogeek.net