... years experience Steel forging auto parts1,Name: Steel forging auto parts;Steel auto parts;Forging auto parts 2,For the similar auto parts,what can ... do ?1), Ability for the material of this kind of auto parts: Grade3.6,4.6,4.8,5.6,6 ... oxide coating,hot dip galvanizing,etc Flame plating Light oil,spray coating,electrophoretic coating,etc Polishing Grinding and polishing,etc,except ...