ORIGINAL: Doug S

I've been useing it for many years in ML'rs, cap n ball revolvers,BP cartridge rifles and revolvers, no trouble with rust or any so-called build up. To be honest, if the gun is really clean and dried, plain old Remoil will keep it from rusting as well as it does for smokless shooting guns.Anything that will keep the air off of metal will prevent or slow down rust but if any kind of salt or corrosive is between the lube and the metal, you will still experience some rust-might just take a little longer to form.

Doug