How do I remove a stuck faucet/tap cover?
Go to your local hardware store and purchase a strap wrench:



The rubber strap wraps around and grips the cover. Then you rotate the wrench anticlockwise to unscrew the cover off the tap. The strap prevents scratching of the finish which would normally occur trying to unscrew the tap with the jaws of a regular wrench. There are also regular-style wrenches with soft jaw fittings that may also be used.