Was thinking marine grade white grease. Small tubes easy to handle.
C5's are critical for greasing door hinges. If you don't it puts a great deal of stress on the fibreglass that holds the door hinges on. Small maintenance job with potentially big rewards.
I like the silicone spray as well. WD-40 is a good lube but dust sticks to it like a magnet. WD-40 gel works great but same problem. I find the silicone doesn't attract and hold the dust as much but you do have to apply it more often.