I wasn't sure where to post this... Does anyone know how to restore a sandblasted finish on stainless steel watch parts. Brushed finish, sure. Polished finish, sure, But sandblasted? When the grainy matt texture gets scratched it gets 'smoothed' and becomes shiny... Would a vibratory tumbler (ladies!) do the job: https://www.sandblasters.co.uk/index.asp?function=search&search=vibratory tumbler Any thoughts?