I am fixing up a pair of grilles from a 1970 Oldsmobile Cutlass S. (the grilles are the ones with the horizontal rectangles). Can someone point me in the right direction for finding the correct grey paint for them?

 

Wouldn't that be Krylon Dull Aluminum? Others will chime in!
68 442
70 F85

 

Yep, I used Krylon Dull Aluminum on the grilles and tail lights on my '71 and it matched the original color.