Hello, I am trying to restore a vintage terracotta pot from Greece which could be fairly old. It is part glazed and part unglazed. At some point, someone had the bright idea of painting the unglazed part of it with what looks to me like gloss paint … this must have been some time ago so the paint is old too. How can I remove the paint and restore the pot to it’s original state without damaging it? Any advice very welcome.