Note: I realize this isn`t really a detailing story, but a story worth telling I think...
When I got my truck last January, I inherited/found that the drivers door roller hinge was frozen up and the door made a terrible creek when opened/closed. I tried WD40, liquid wrench penetrating oil... but it just wouldn`t come loose and roll. I resigned that at some point I`d need to have the hinge replaced $. Then I sprayed on a good coating of Fluid Film. (Fluid Film is a lanolin (sheep grease) based product used as a lubricant and rust preventative.) After a couple of days, the roller began working again as it should. They say that Fluid Film also works well in locks that stick or are frozen up. I have since used it inside doors, rocker panels and such as a rust preventative as well.
It`s worth considering if you have similar issues.
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