Well, luckily I haven't had to use my Aluminess D-rings yet, but they've been hanging out in all kinds of weather and I was a little surprised when I went to remove them and they didn't unscrew.
Then I bent a 3/8" rod, inserting it through the eye of the screw bolt and hanging on it with a wrench (wasn't a very strong rod I guess)
Then I went for the big guns:
I hate to tear up the eyes, but it was this or leave them on. For the record I don't carry a pipe-wrench, cheater bar, scrap wood OR extra D-rings in the van, so it's a good thing I didn't find this offroad when I needed to open these.
The wood was used behind the D-ring to alter the position from against the bumper, such that the eye was at a good angle for the pipe wrench. Here they are off:
I currently keep all of my Jeep D-rings in the vehicle, but I didn't used to and this never happened (I've had them tight, but never rusted) of course, then again I was using them all the time....
As you can see, rust is the issue- I've had plenty of experience with rust and while a little PB Blaster probably would have helped, I didn't want to get it on everything:
So, I'm thinking head bolt anti-seize after I clean them up. Any other suggestions?