Upload & Sell: On
Step rings suck! I know, 'cause I use them a lot for ND filters.
As mentioned in both previous posts, don't make them too tight. Of course, this can be counterproductive in some situations, and can it happen all on it's own, depending on what temperatures the gear sees.
For light lube, I prefer light mineral oil for most photo gear. It doesn't dissolve stuff, but I rarely use it. IMR, never used in on step rings. YMMV.