"dave AKA vwdoc1" floridly penned in news:9iqwd.47876$ snipped-for-privacy@newssvr33.news.prodigy.com:
I use spray cans of Rust Check (Krown is hard to find) from Canadian Tire, and have for 16 years. They come with a little red tube for spraying into tight spots, such as locks.
Since I started using this stuff, lock failures and freeze-ups in all cars are zero. Weather-flap spring failures in all cars are zero. Locks work as smoothly as new, even in the dead of winter, and even after 16 years.
Silicone spray is good for industrial equipment, but not for automotive locks.