OK, specific recommendations from a 30+ year gunsmith, which I trust completely (name withheld).
Products as follows:
for Stainless slides and parts, a specifically formulated lubricant for stainless:
Birchwood Casey RIG +P Stainless Steel lube
For total cleaning/soaking/penetration/freeing up old parts, etc:
KROIL by KANO labs (
www.kanolabs.com)
For general lubrication: OneLube SLICK 50
Spray thoroughly on guide rod, rails, barrel hood, whatever, anywhere you like.
When wet, rack slide maybe 12 times.
Wipe off all excess with a paper towel and you're good to go shoot or store or whatever.