I have found a cast iron grill manufactured by the French company Le Creuset. This cookware is probably around 20 years old and you can see a picture of the same model below.
I'm wondering if this grill is enameled cast iron or raw cast iron. Indeed, if it's raw cast iron, I will strip of the former seasoning and create a new one. If it's enameled cast iron, I'm not sure how to deeply clean it but I will not put it in my self-cleaning oven.
Today, all cast iron products from Le Creuset are enameled but I don't know if that was the case 20 years ago. The cookware is black and has been used a lot, so I don't know if the (quite) smooth aspect of the top is enameled or not.
Do you have any tricks to recognize if cast iron cookware is enameled or not?*
Photos (click for full-size)
On this last one, you can see "Le Creuset * Made in France* D2" but I didn't find anything about D2 grill model on the internet.