Knowing how much paint you'll need for a room is never a straightforward calculation, which is why we've all been in that tough situation: after redecorating your space, you find yourself left with an awkward amount of paint still in the tin — too little for another full project, but too much to simply throw away.
But even if you were to, knowing how to dispose of paint properly isn't always so straightforward either. And while it's wise to keep a small amount of your main wall color for touch-ups in the future, it's easy to become inundated with almost-empty paint tins... likely full of paint that's gone bad.
