And silicone won't give you much rust protection. Go with a light coat of white grease, then wipe it off and hit it with WD40 before you retract them. Although the heavy duty jackstands is an even better idea. HWH no longer recommends silicone, they recommend WD40.
Ole and Anne Anderson, Highland, Michigan
'02 Adventurer 32V, Ford F-53, ours since 4/08,Hankooks, Konis, SeeLevel, CHF
'84 CJ-7 , 5.3 Chevy, 3" lift, 33's, Detroit Locker, Fiberglas tub, winch, hi-lift