RE: possible rail lube
I don't see why it wouldn't work. I Keep my string and serving well waxed after every shooting session and will rewax if shoot more than 15 times. My rail lube of choice is nothing else than Crisco shortening. I got a tub of it that I use for shooting my black powder pistol. I keep it in an all plastic syringe that holds 60mg's used to give small kids medicine.
Its slicker than snot, orderless, and cheap. Think a 1lb tub is $3.