Pro tip: A tiny bit of beeswax saved a stuck lens ring on a Leica M3
Had this old Leica M3 come in last month with the aperture ring totally frozen, wouldn't budge at all. The owner said he tried everything, even some weird oil he got online. I was about to start a full teardown, which is a big job on those. Then I remembered my grandpa, who was a watchmaker, used beeswax on stiff threads. I had a little block of it for my tools. I rubbed the tiniest amount on a toothpick and worked it into the seam of the ring, let it sit for an hour. After that, I warmed it gently with my hands and it turned smooth as butter, no force needed. Felt like a total hack but it worked perfectly. Anyone else have a weird household item that's saved a tricky repair?