[mad welder 4]

If you want to use 7018 try lincoln. They have "moisture resistant" 7018. Plus you could always keep the rods in something like a 40mm ammo can after you open the package.
What I do is I put them in plastic rod holders by size then keep them all in the ammo can. Keep it closed and only open it to grab what I need.

Plus, If you happen to have an AC only buzzbox then 7014 runs very well on a 220 volt AC buzzbox. 7014 not the best choice though for a 110 volt dinky transformer as it likes a few more amps than other rods of equivalent size.

On my Lincoln AC-225, I run mostly 7014, 6011, and some 6013 for non-crtitical stuff. Heck, all my stuff is non-critical so who am I kidding. I usually use 6013 for stuff that is the least critical of my non-critical stuff. 7014 for anything requiring strength and 6011 for anything dirty and rusty.

I haven't met a 7014 that doesn't run AC well.