SOMTHING I FORGOT TO MENTION that is VERY important before you start to polish the grills or other parts. Many of these parts have a silver anodizing on them. That must be removed before you can polish the parts. I used Easy Off oven cleaner and a 00 steel wool. It will take two or three times to get the anodizing off but you have to do it before you polish it. You can tell when the anodizing is off when the steel wool starts to grab onto the part. When the anodizing is still there the steel wool kinda slides over it, making it feel very smooth.