There are also metallic driers in some finishes. AIUI, lead compounds aren't used for that purpose any more[0], but other metallic salts are: https://en.wikipe

There are also metallic driers in some finishes. AIUI, lead compounds aren't used for that purpose any more[0], but other metallic salts are: https://en.wikipedia.org/wiki/Oil_drying_agent https://en.wikipedia.org/wiki/Oil_drying_agent I am a furniture maker, not a chemist or an industrial hygienist. Please don't take my word as gospel on any of this. [0] Which is a distinct use from the lead pigments used in lead-based paint, like white lead.