Dave,
I did just that.
Plastic container liquid tight.
Inside a 6/7 gallon pool bucket.
Still rusted.
I now keep the chems outside in a plastic bin. no more inside shop where metal resides.
On another note. the chems are so inexpensive. and easy to make on the fly.
I keep thinking Ill discard and make as needed. even if the chems were 10x as much?
the costs pale in comparison to my machines rusting. I easily pay more for 1 cutting bit
than the chems are worth.
If you never see rust? you are lucky.
Sam