The medium and bright silvers I’ve got from GW are named as ‘Leadbelcher’ and ‘Runefang Steel’, the first is a Base paint and the other a Layer whatever difference that is meant to be. I’ve a ‘Chainmail’ paint in a glass bottle from Miniature Paints which is more or less the same as Leadbelcher. I prefer Miniature Paints as they are cheaper but have difficulty getting them,