Beware of using Kroil in the house. When my very first can arrived at my house I immediately began swabbing down the bores of some of my pistols and rifles at my little card table set up in my home office. The look on my wife's face when she got home and walked down the hallway to my office told me that I should only use it in my backyard shop.
Hoppe's=inside.
Kroil=outside.