Is Machine Grey the same as my '04 Graphite Metallic (paint code PDR/ZDR)? If so, let me share my story with you:

A few weeks ago I scraped my rear quarter panel somewhat badly so a painter friend of mine helped me sand down the panel for repainting in his paint booth. When it came time to buy the paint from the auto paint store, the clerk's DuPont color code software recognized that the Crossfire uses a special paint, but the formula wasn't in the computer system (he said this has NEVER happened to him before [as a crossfire owner, I wasn't even surprised]). We knew the paint code, but we were still unable to get the formula to make the paint!

Long story short, we removed my gas lid so they could manually color match the paint. I was concerned about the quality, but they were able to make a PERFECT match.

Hope this helps, good luck! =)