...again, I've got a can I've been opening and re-using for over a year. In fact, I just opened it yesterday and did some touch up on some stuff I missed.
I've NEVER opened the lid. I drilled a 1/4 inch hole in the center of the lid. I flip the can over and kind of squeeze it to get what I want. When I get enough out I quit squeezing the can and when it gulps for air I flip it up right. THEN stick the duct tape back over it.... I do this until I'm finished what I'm doing then put on a new piece, rub it down good and then shake it once and put it on the shelf. It does stay fresh.
Try it....you'll like it!! ..... if your impatient you can drill a 3/8" hole in it. Note, since I don't take the lid off to stir it I just pick it up and shake it a little every now and then when I go by it or plan to use it in a few minutes.