Yes, you would get far more subject dedicated help by starting your own post in the Technical and Restoration forum. Help will be hit and miss in this post.

Please let me revive this old thread for a current project & products and results for added data and content. I will be shooting my 68Z "DF" 4 rims with:
PPG/OMNI MTK: Acrylic Urethane Single Stage
Code # 8568
Color: GM Argent Silver

Over-On top of: PPG DP90LF Epoxy-Sealer over Glass Bead and Walnut blasted bare steel prepped with Gray Scotch Brite pads.

More to Follow.

Looking forward to seeing the results. From the research I did to determine the "correct" Argent Silver (AS) paint mix for rally wheels, I learned from NCRS research that Kelsey-Hayes used several different shades of Argent over their long production run so NCRS concluded there is no single correct shade of AS.

I should have shot a series of Tests to accomplish a "Flatter" Finish.
Per spec sheet: SU4985 Universal Matting Agent.

They Came out WAY to glossy, I knew better and have a recovery plan to scuff with 0000 steel wool later on the Face portion that is visible at a later date.

The Silver grain is very tight, fine & well distributed, clean w/o weird tints. It took many many coats to cover the black primer. I shot it within the "recoat" period specified. Patience was required following the Tech sheet. I also did not go crazy on "body" working the Wheels since they cleaned up very nice with Glass Bead & Walnut media & I am not super good or willing to Body work wheels.
I am a Fan of Krylon 1403, but for the durability of a single stage two component product will be better in the long run I feel.

I know I am going backwards with this, but the GM code for Argent Silver is WA 3024.

You are OK;

GM Code WA3024 cross references to DITZLER-PPG 8568

per:

https://paintref.com/cgi-bin/colorco...=&sname=Argent

I painted one for the first time last month