Beartrap has it correct, if using APP, cleanup is easy, I use windex with vinegar right from store, then balistol. You can use plastic hulls too with plastic wads, I have had some magtechs stepped on even by me.
I like the gun vault only thing I would do differently is get waterproof one. Found out truck cap leaks. So put rubber backed comercial rugs hung over edge, also help when you open tail gate you dont see locks.
Also get a very good alarm system that goes to your phone with locator just in case.