Kentucky Trailer - Lubricating Door Hinges

PL 19 has helped with the hinges on my horse trailer. I would use it on a regular basis in your case and see if if gets better.

 

Yes it is of sorts. Some of my hinges are welded on. Trailer is normally sheltered. I have been working with it for a while. This has done best.
I agree with some of those other folks. Replace them. Take them off and soak them in aluminum bright or run a drill bit throw them. Put it back together with anti seize. That cannot be done with some of mine and this is working so far.
Part of my problem is the truck that pulls it is a 2008. It is not going to make it to 90,000 miles this year.
If you spray them regular it might work out?

 

A flex hone would work good if you get the bolts out. They start at 3/16". You can buy them online at tool suppliers such as JB Tools etc.
Flex Hones, Flexible Honing, Flex-Hone®

 

@JeremyTourville there's a nice budget way to make small hones. Cut a slot with a hacksaw blade in the end of an appropriately sized dowel rod, and cut a strip of sandpaper not quite as wide as the slot you cut and about twice as long as the diameter. Slide the strip of sandpaper in the slot curl it in a reverse s shape, and use the drill spin it as you run it up and down the bore. Does a real good job of cleaning it up, if it's really trashed in the bore start a little more aggressive with the Sandpaper, and then run a higher grade to clean it up after you get the trash knocked off it