hum, i unassay don't admit this, but except for a massive wolf gang puck top an bottom roasting pan for baked hams or turkeys no matter how big and a stainless 8 inch WGP skillet, everything else i have is at least 30 to 40 pre-1968 Reverware , and better then 20 lodge just plain cast iron, and 1 old Wagner square cast iron skillet, it became a obsession when i got a square pre-68 reverware skillet, 90% i have no use for, and matching lids for all, my Reverware pressure cooker is a 1944 and still never been used, but this year ny nephew bought me a enamel Lodge 5.5 qt pot, so i use it on my offset stick smoker to smoke baked beans, I know all but nothing about enamel, but no SOS/Brillo pads touch nothing of mine cookware, you can pour ketchup in it for a couple days to see if the acid from the ketchup might work,
Dawg