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.
How to clean rusty door hinges without removing them.
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.
The moisture mixes with oxygen and forms rust.
Scrub the hinges and the hinge pins vigorously with a scrub sponge or coarse steel wool.
If they re clean turn the stovetop off and rinse your hinges in water.
Be sure to dry the areas in the screw holes as well.
Wet lubricants collect dust and gum up over time.
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.
Use tongs to pull the hinges out every 10 minutes and examine them.
Rust converter spray paint.
If there is a lot of rust use steel wool.
Goes on clear and turns black.
Rust accumulates on door hinges when moisture is allowed to build up on the surface of the metal.
Try to remove all dirt debris and any rust that may be present.
Be sure to mask of the places you don t want it.