Vaseline is one of my favorite things in the shop. I keep a syringe with Vaseline in it with a large gauge needle with the tip ground blunt. Use it to inject some Vaseline where you need it (set it in the sun for a while to soften things up). I use it on fastener threads and when tapping. It's dynamite for kitchen drawer rollers -- and lasts for years. It's just the thing for door hinges -- lasts a lot longer than mineral oil based oils that gum up after a while. Smear it on where you don't want paint, epoxy, or solder to stick. Every woman in the world knows to put Vaseline on the bottle threads of nail polish to keep things from sticking. This works great in the shop too -- I think my favorite use is on the threads of those cans of PVC cement that seem to be designed to dry out and stick. Use it to stop sticking and put enough on to make a good seal. I've got a can of cement I've opened and sealed many times over the past couple of years. When you're done with a tube of caulking, silicone sealant, etc., suck the material back into the tube a ways then put a dab of Vaseline on your finger and plug up the hole or the caulk tip. When you need to use that tube a year from now, just squeeze out the Vaseline onto a paper towel and you're back where you started. I wish I had thought of this decades ago so I didn't have to throw out so many dried tubes... By the way, to get the Vaseline into the syringe, pack it in with a Popsicle stick. Then heat it in the steam from a teapot to melt it -- this lets you squeeze out the excess air.