Kentucky Trailer - Lubricating Door Hinges

I have a trailer that needs a little love. Several of the doors have hinges that are very sticky and harder to open than they should be. The hinges are simple enough. They have a long bolt through them with a nut on the bottom. I have loosened the nut slightly and tried to beat the bolt upward with hammer and brass drift. They won't budge. There's very limited space to get any PB Blaster down in there, though I did try.

I think my trick of last resort is an air hammer. Hopefully some percussive therapy would get them to free up.
Can anyone suggest other ways to free these up?

Last, any suggestions on the most appropriate lubricant? I understand that a dry lube is good so that it doesn't attract dirt. Also, a white lithium may be acceptable. Any other thoughts? Thanks!

 

That's a lot of hinges! This moving van has 2 rear doors, 3 curbside doors (where 2 doors are split style and open down the middle of the door opening) and 2 large "barn" doors on the street side.

We do agree on using a good dry lube though.

Yes, that is the intent of my question. I am trying to recondition the existing hinges. I am wanting to see if anyone has alternate suggestions to help free up the bolts. I think if I can get the bolts out, I can clean up the hinges. That is my primary focus. Which lubricant to use is secondary.

 

Roger that.

I have tried spinning the bolt head and I can't get many of them to budge. If I go too hard I'll end up rounding over the head. I know the picture doesn't show it, but the head on the bolt has a flared bottom. The only way I can drive the bolt is up. Basically, I wanted to see if anyone had tips and tricks for dealing with this.

 

That's a good point. Give them a little boost. (Just don't go too hard)