I have been using Flitz's Gun Wax on the exterior of my firearms(both the wood and metal) for years. I have had them get drenched while if the field*, wiped them off and never had a problem with rust. It also doesn't leave any trace of an oily feeling whatsoever.
*Contrary to popular rumor it does rain in Arizona!
Jim


The 2nd Amendment IS an unalienable right.