I’ve just had mine stove enamelled. £70 including blanking off all holes and blasting clean preparation.
I thought I couldn’t find a stove enameller, only powder coating which I didn’t want.
I had some tinware blasted by our local powder coaters and when I mentioned that I couldn’t find a stove enameller they told me that they could do it. It looks a nice job but time will tell. They say it bakes on harder with heat and use. Apparently most people don’t want it bacause it is more expensive than powder coating.