Grounding point

["R.Wiratorn" <withu@loxinfo.co.th>]

Hello, this seems to be new knowledge for me
	
	<<<The point to which you make your ground connection should
	be an unpainted piece of bare metal. 
		Some cars (Audi, Porsche) have galvanized bodies, and in 
	these cars, you must find one of the manufacturers' grounding 
	points or else some noise can result.>>>
	
		Ah yes , I know we have a galvanized body car, but I don't
 	know that there is (are) a special grounding point(s) in the car,
especially
	in the trunk where the power amp. be grounded.
		Is this true ? and where is that grounding points of our galvanized
	car ?

		I found the above statement from
	 http://www.mobileaudio.com/rac-faq/section2.html#5

							Ben