Wren, the area in green had surface rust so I just hit it with some sand paper but it is pretty much level across the entire surface as these rotors probably have about 3k on them. The Wildwoods cover more area but not all and I didn't dye them to find out but it will show up when the untouched area rusts a little.
Al, your correct about the weight as the 8 that I saw was a six. The spacers were used for the rears as the spindle heads were contacting the Fuchs center caps and pushing them out. I just did the fronts as well to try and keep the trac balanced. I have plenty of thread to engage my lug nuts.