Re: rusting stainless
It could be 316L active... But most likely it is some cheap 300 series like 304, or 300. Either way, NEVER SAND STAINLESS. whatever you had, you not have active stainless because you have sanded away the passivated (if there was one) layer. Giver everything a good clean, get the wax off of it, then dip it in a vinegar bath.
This will re-passivated it. It may still rust, but it should be much slower than before.