@gunrunnerjohn posted:Since kitty litter is designed to absorb moisture (it's major job), I don't think I'd want it against track that has any possibility of rusting. If you're using Atlas track or perhaps Gargraves stainless, it would be OK, but I wouldn't use it for any steel track.
It doesn't work that way.
MANY of the materials on your layout absorb moisture (i.e. are hydroscopic) --including things like paper and wood. They ABSORB water, they don't EMIT it. The water comes from the air. Any hydroscopic material in an open environment will remove water from the air until it is in equilibrium with the ambient humidity. At that point, it will make no difference either way. In a CLOSED environment, it would actually REDUCE the exposure of your tracks to moisture (by removing it from the air). Those little hydroscopic packets that come in bottles of medicine aren't there to increase moisture exposure.
Kitty litter will not rust your track.