Thanks Guys...
I thought i had a "Shortcut" solution today. I used some copper cleaner on a test piece of oxidized aluminum and it came out "clean" and so i then dunked the case in it. Welllll.... It's now a consistent shade of darker grey... lol! Maybe if i leave it in over night it will be a cool shade of black.

Anyway Guess i'm gonna invest in a blaster!

Thanks