[fun in dirt]

I used oven cleaner to get the clear anodize off. And get the smelly expensive kind...I tried the "fume-free" and it doesn't work near as good. Soak the grill down good (after removing all the plastic inserts & such) and let it sit till you see the clear bubbling up. Then scrub it good with a brush before rinsing it off. Don't forget to wear rubber gloves & safety glasses while doing this all.
It may take doing this two or three times to get it all off.
If the grill is scratched up, sand it till scratches are gone then start increasing the paper grit until it gets smooth. Using aluminum polish is the last step. But if you want a clean, dull, brushed look...finish it off by rubing with a green scotchbrite pad & WD40.
This is what worked for me!