I sometimes do odd jobs in a church, including rehanging doors. The church is 400 years old, I think the doors are a lot newer but still 100-150 years old.
Getting the hinges off is not easy (to say the least) but I at least want to help whoever is doing my job in another 150 years. So I pre-bore and lubricate the screws. My father was a chippie and used vaseline, but a fellow odd-jobber said he uses soap.
What is the best lubricant? soap, vaseline or something else?