I recently was cleaning out the shop and came across a box of old pistol powders, 3 or 4 different brands, that I stored away years ago (Like 30 years ago). All of them have been opened, all have been stored in a climate controlled area. The ones in metal cans have rust on the outside. I popped the lids and took a whiff, one had very little odor a couple of the others smelled a little sweet. What do you guys think? Still good?