Prevent Paint Skinning
If you use paint often, you already know what skinning paint is like. This is what happens when the can is left open for a number of days. It might not even take that long before it solidifies!
No one wants such a thing to happen, right? You can actually prevent this by adding foil to the can and blowing into it upon closing the lid. The presence of CO2 means that oxidation can be prevented.
Ad-hoc Baking Platter
It really is not wise to put a cap on your creative juices when they are flowing. When this happens, you can go to the kitchen and start baking. A wrong-sized platter should not get in the way.
You can just get a piece of cardboard and then wrap it in aluminum foil. Yes, folks, you better believe that it is just that easy! Now feel free to bake as much as you want.