Can't say I like the vegetable oil idea either. Would need constant cleaning or the stuff is simply going to end up as fordo suggests a rancid horrid mess. Seems to me that the given the small amount of lubricant required (most people apply way too much) the cost of using SailKote is not really a major consideration.
"Said Hamlet to Ophelia, I'll draw a sketch of thee.
What kind of pencil shall I use? 2B or not 2B?” Spike Milligan