When the lids on the cans start getting rusty, and you get the ammonia smell, best to clear things out pretty quick.
About 20 years back a good friend and i split 100 # of WC872 we bought for a dollar a pound.
I store mine in clean windshield wash containers and have given several away to friends.
I have 3 jugs left i will save for a rainy day.
I have other surplus stuff i have no idea about, but it seems to burn about like 4350.
Just keep adding a grain at a time till the bolt starts to get sticky, then stop and back up a grain.
