When you have used up a can of spray paint, save the lid! They can be used in a variety of ways. My work bench is covered in them.
A few possible applications:
* Storage of small items - loose kit parts, electronic components, fish plates, track pins, etc.
* Dispensers for track ballast and diorama ground cover material. They are absolutely ideal for this - just the right size and shape, and much easier to handle than spoons or commercially available applicators.
* Mixing pots for glue, paint, scatter material or anything else that needs to be mixed.
* Holder for syringe, pipette or what ever you are using to apply glue to ballast, and use another one for the glue itself.
* Holder for Superglue bottles, etc., to stop them falling over.
I am sure you can think of many more uses!