Hartstone USA Pottery Wine Decanter

the person I bought this from said it had only ever been on a shelf. it has some marks on the outer. please see pics. I think it had rubbed against some crayon or something reddish and orange when it was placed in a box with other items. marked Hartstone USA on bottom. the inside is glazed, the outer feels more unfinished. love the circular shape! please see pics for assorted marks in assorted places. these would probably come off with some effort, I am just not sure of the best way to clean this piece. unusual piece! 1970s mid century donut shape heavy! cannot be bundled! smoke-free and pet-free home I love offers!