I overlooked the grease fitting on the base of my stabilizer outriggers, and one of the pins froze up. As this is the low point, it easily gets wet. (I was working in a creek quite a bit.) The opposite pin was not frozen, but I pulled it, and it was rusted.
I had to make drifts to drive the pins out, and removed rust. A friend put the pins on his lathe and milled a relatively fine thread from near each end of the pin to the center to hold grease because the tolerance was very close. You only want to thread the part of the pin that is 1/8 or more within the sleeve. It took a lot of grease to fill it.
If you don't have a zerk installed, I think removing the pin and greasing it manually at intervals would be useful. Threading the pin lightly will increase the grease reserve, but don't go to the ends of the pin, because you want a close fit with the sleeve there to help exclude moisture and retain grease.
Of course, if you are going to remove the pin, you might prefer to drill and tap and install a zerk.
I have not heard of the threading trick before, so don't know if there are any negatives.