Stop the rusty scream!

[Capcha]

I live in an apartment. I can certainly ask the landlord to fix the problem eventually; i would still like to know how to fix it soon.

The door to the fire exit has a rusted corner. So does the door frame. As the title suggested: upon opening, there is an instant, loud scream. It sounds like a person or a dog's yelp. It's enough to catch the neighbour's attention.

What could i use to fix it (or at least alleviate the friction)? The door is metallic. Keep in mind , where i live, the temperature is on the drop, humid and wet.

Much appreciated!

[usedtobe]

Easy, lazy: WD-40

Too much work: emery cloth to bare metal, prime, paint, check for square & plumb. correct as required

[Capcha]

Thanks usedtobe

[Sparky812]

Easy, fun: 10 pound sledge!

[FoieGrasIsEvil]

Fun to say: Jigaloo.