The exterior of the fire pit turned golden/blue hue, I want to know the best way to remove the patina

Our favorite way to restore the beauty of your Solo Stove is with a little all-purpose stainless steel cleaner: Barkeepers Friend. A quick scrub will take you back in time to the first burn, when you just couldn’t stop adding logs to the blaze that danced for you until the stars came out. This demonstration will show you how to make your Solo sparkle: