The amount of time it takes to get your brass hinges clean by simmering them in milk depends on the extent of grime and tarnish the hinges have acquired.
How to clean rusty door hinges without removing them.
Rust accumulates on door hinges when moisture is allowed to build up on the surface of the metal.
Wet lubricants collect dust and gum up over time.
Try dabbing a paper towel of a microfibre cloth in clr and rub the areas that are visible to you and ugly to look at.
If there is a lot of rust use steel wool.
Wd40 is one of my favorite products and a staple in my workshop but i always use dry graphite or spray silicone lubricant on hinges.
Be sure to dry the areas in the screw holes as well.
Goes on clear and turns black.
The moisture mixes with oxygen and forms rust.
Use wd40 if the hinges are squeaky paint can sometimes be chipped off if you use a chizzle or small dry wall knife depends how many coats ans how thick the paint is.
Use tongs to pull the hinges out every 10 minutes and examine them.
Be sure to mask of the places you don t want it.
Rust converter spray paint.
If they re clean turn the stovetop off and rinse your hinges in water.
Try to remove all dirt debris and any rust that may be present.