..just as info. I currently have a can of POR15 that has been open for quite sometime (months) and I still use it ocassionally.
A fellow bolter, I forgot who, suggested drilling a hole in the top of the lid and pour out what you want to work with then tape it up with duct tape. I have done this quite a few times and its till good. I usually put a new piece of tape back over the hole and shake it a time or two. Just make sure the lid is clean and you rub the tape on real good.
I like this method as it will "skim" fairly quick if not careful. So, I pour out a little at a time so as not to waste it.
oh, I drilled a 1/4" hole in the center of the lid.
Hopefully this will help someone preserve what they don't use up.
