This is way outside my area. I have a 4" long 1/2" D. rod of 6/6 nylon, inside a mild steel tube. The application is all-weather. Length of rod travel is .70 to .75 inch. Light use, 20-50 actions per day. The application is an oddball latch release lever. Nylon was chosen because of cost and it is a non-conductor. What lubricant if any should I consider? It will live out in the boonies so I want to make the fewest possible number of pilgramages for maintenance. And any moving part is the likeliest point of failure. Thanks folks.