Correct paint color for a 1970 Dart 8 3/4 axle assembly

70dart340 said
Could you elaborate, please? Maybe I need to update.

All I know is the two places near me that sand blast switched to crushed glass. There are two different size glass they use, a course and a fine. I asked about why they went to glass and they said it doesn't heat up metal and warp it like sand does.