Don't laugh, but I have the Mirzam wheel too and just recently had about a 5" long curb rash and used paint coverup from my old 2000 silver VW Jetta, which is long gone, but it worked great. I actually just reordered a bottle from http://automotivetouchup.com
Item No.: HBTL-BC
Description: 1/2 oz Touchup Bottle, 2000 Volkswagen Jetta: Silver Arrow Metallic LG9R
Item Price: $9.95
I also ordered some microdabbers. Couldn't tell you if they're good because I haven't tried them just yet and I hope I won't have curb rash again.
Item No.: MDAB
Description: Micro Dabbers (Pack of four)
Item Price: $0.95