Quoted from NJGecko:
So once you use it, do you need to seal the metal with anything? I know I've wire-brushed off things before and if you don't clear it, you get surface rust almost immediately.
I have used it on legs with slight surface rust and just make sure to clean them off with soapy water and then water after the 24hr soak in CLR/evapo. I dry them immediately and then put on a quick layer of wax and wipe it off. So far not rust has returned.
The evaporust has paid for itself in bringing back life to probably 12 sets of legs so far.