Brock,
I have used that on wheels and other black plastic trim. The sliding shelves on the Flat-Top are porcelain coated steel just like hoods and earlier control panels. My shelves have a very bad case of “Weber fade.”
View attachment 85857
I tried the Pam trick and was surprised it did as much as it did.
View attachment 85858
Of course, Pam is only a temporary “fix” and can’t eliminate scratches. Even sitting inside my house it is still slowly wearing off.
I am considering Jeff at IPE in Kansas who does amazing re-porcelain coating. That would make them like new. Need to concentrate on taxes right now. Getting some returns done could help pay for sending them to Jeff!