WD-40 is NOT a penetrating oil. It IS a water displacer (WD) and contains menhaden oil. The menhaden oil will go gummy after a short time and turn into a dust/grit magnet.

My prefered solution is a very light coat of RIG or 3 in 1 oil (a very light weight napthenic) or even NON-detergent motor oil.


W. E. Boyd