Somewhat embarrassing how little I did--I just scuffed it up with some 100 grit, then hit it with eastwood pre-paint prep to get the last of the goo-gone (oily) off, and Krylon Satin Black spraypaint--about three coats. Honestly didn't even think about primer, even though I have some plastic primer . . . because the paint is satin, I reckon any retouching it ever needs will be super easy.
Would have loved to order a 105 grille, but this looks really similar--as far as I can tell, anyway--and is roughly $340 cheaper . . .
That's awesome i really appreciate you sharing your process. I agree, looks just as good as the 105 without the $$$.