Hi Bill,
I just took my grills and a few miscellaneous small parts to the sandblaster, who didn't seem to have a problem with my request to blast them. He did say, however, that he would need to use soda for those two parts. I tried chemical strippers, which became tedious and difficult to do in the grooves on the backside. Have not decided if I will powder coat them or paint them. I found the satin black spray cans from Rust-oleum (Universal Advanced Formula at Home Depot) with the hourglass top works great for anything satin and sprays beautifully, and looks identical to my satin black on the rest of my car, even the trunk, which is NOT Tiefdunkelgrau, but sating black. Alternatively, I was thinking of using a black satin powder coating which I can also do at home.
If anyone has powder coated those two parts, I wonder if they could comment on how they turned out. Since that would be more chip resistant than painting, I am personally leaning to doing the powder barring overwhelming negative feedback.
Bernd