With regard to pollution prevention issues, I would think the issues and BMP's for auto repair / auto body shops would be similar to those for dismantlers (management of working fluids, solvents, scrap metals, etc.) and there is a huge body of resources that can be consulted online with regard to this industry sector. Some recommendations:
CCAR - Greenlink http://www.ccar-greenlink.org/
EPA Region III Waste Reduction Clearinghouse - Auto Sector
Pacific Northwest P2 Resource Center - Auto Repair
This site also does a good job of listing the relevant auto dismantling / recycling trade groups that should also be contacted.
Western Regional P2 Network - Auto Repair Topic Hub
Roger M. Guttentag