How to Grease your Brake Caliper bolts

This is what I do at least twice a year to my car...

[x-man]

1.You cleaned the bolts but not the holes they go into. Why would you think the inside dia of the bolt/pin hole looks any better than the shank of the bolt/pins you wire brushed?
2. I didn't get a good look at your bolt/pins but if you wipe them with a rag and solvent to get clean and you see almost ANY pitting corrosion they are trash. You can clean them up and use them again but they will corrode even faster than before or sometimes just stick because of the rough surface. Wire brush on bench grinder will take off the rest of the protective plating that is a corrosion resistive coating and reduces friction. It's a common mistake but you have done the exact thing you want to avoid with these particular fasteners.
These bolt/pins are the weakest designed part of disk brakes. They live in a harsh, corrosive environment and nobody touches them until something is already wrong. Good on you for trying though. If I had a situation like yours where one wheel is always problematic, I would probably try using Lithium marine grease on a new bracket with new bolt/pins. It is more resistant to water washout. DO NOT USE MOLY Grease. I know you didn't but there are lots of less experienced home mechs who will read this. Moly (molybdenum) grease encourages galvanic corrosion with steel/iron. If you have black grease in your garage, ditch it.
3. The light weight oil you used on your lugs does not have the "film strength" to last very long for what you are trying to accomplish there. Anti-seize works very well there, that's what it is formulated for. If you live in the rust belt, or anywhere else for that matter, there are many places on a vehicle where anti-seize can be used to very good result, especially on the chassis. It will NOT cause fasteners to come loose on their own.
Remember when working on vehicles, the devil is in the details. There's often allot of details. Even the experts get it wrong sometimes. Guess how I know. Cheers.

[shawnkiesel]

You didn't show, putting the bolts in..

[neilt]

I agree with lubricating the sliders with a grease for that purpose but why oil the lug nuts. Don't you realise all of the crap of the day sticks to oil.