So I have been doing some experimentation over the past month with this stuff as I have been meaning to for awhile. I have found that even though it has a limited time before it completely hardens in the can that you can extend this time in cold storage. I stretched an entire can to almost 3 weeks time by storing it in the back of my refrigerator. Now, I am not sure what my temperature is in there so I'm sure your mileage will vary. I was able to clear a mini playfield, a full size playfield, and two 1/24 scale model car bodies. In the end I was left with maybe 2-3 oz's of clear. I sprayed it out onto a test piece of black painted styrene to check for clarity and got tons of tiny bubbles, so if you plan to try this like I did and you have 2-3 oz's left throw it out. I have found that in a 60-65 degree climate the clear will last in the can unsolidified 3-4 days tops.