I just found another site you may want to research.
http://www.industrial-rubber.com/iqs/sid.09771940773121822904423/rubber%20bonding.html
Good luck,
Brad Dunleavy
Rubber Floor Mat products
www.rubber-floor-mat-sale.com
You should consider liquid rubber. It will protect metal from corrosion, it's impact resistant, and it will also give a good surface to bond to. http://www.liquidrubber.ca/
Brad Dunleavy
Rubber Floor Mat products
www.rubber-floor-mat-sale.com