coin cleaning
process of removing undesirable substances from a coin's surface in order to make it more attractive to potential buyers
en-GB/ˈkɔɪn ˈkliːnɪŋ/
en-US/ˈkɔɪn ˈklinɪŋ/
process of removing undesirable substances from a coin's surface in order to make it more attractive to potential buyers