Boiled linseed oil as an oxygen scavenger. As a quick hijack/digression, we all know how linseed-ed shop rags are a no-no in waste/trash cans. They are subject to spontaneous combustion. My friend escaped death in a methylated spirits spill fire yesterday (knocked a bottle onto a glass-bar electric floor heater). Splashed his feet. Blister burns to both feet & ankles. Ready extinguisher saved him. Please excuse my rant, please delete if policy. Back to normal transmission..