I haven't been reloading long enough to have any "vintage" powder cans. I've accumulated enough 8 lb jugs that I did not want to drag out every time I set up to use a particular powder, so I bought a single 1 lb can of each so I could keep out a smaller quantity of the powder I was using.
I did this mostly to avoid being tempted to use any old container with sharpie markings. Figured that would come back to bite me someday.
Any suggestions for those 8 pounders of surplus powders?