The only way to repair that is for a stone mason ( possibly someone that works with stone kitchen tops too ) to re-hone & polish it. It would almost certainly be cheaper to purchase a new basin and fit it. Try here they have a large selection:- Living Roc

Nature has blessed us with many natural cleaners which make it possible to drop the chemicals in our homes. One of these is the good old lemon. A natural disinfectant, lemons are high in citric acid, are antibacterial and have a low pH making them great candidates for many clean up jobs. When life gives you lemons... These cheery citrus fruits are one of your home's hardest working, most flexible cleaning tools. Just look at what they can do: • Freshen your microwave Make the interior easier to wipe down by heating a cup of water and a chopped-up lemon on high until the microwave's window is steamy. Let the bowl sit for 15 minutes before you open the door, and clean away any grime and grease with ease. • De-stink the garbage disposal Run a few lemon rinds through the disposal and follow with cold water to dispel any sour odors. • Remove stains from linens This tip is safe for even delicate or vintage fabrics: Treat a set-in stain with lemon juice and salt. Let the mixture sit for a half hour, then rinse with vinegar and warm water. • Get stains out of a cutting board or butcher block Run the cut side of a lemon over the board to remove food stains and smells. For extra cleaning power, sprinkle it with salt or baking soda first. If your stains are particularly stubborn, let everything sit overnight before you rinse with water. Wipe wooden boards with mineral oil to seal. • Get rid of tarnish on brass Sprinkle tarnished spots with salt, and then lightly rub with a sponge dampened with lemon juice. Rinse with water and dry well. • Remove a rust stain from fabric Try the trusty lemon juice-and-salt combo to fight these tricky stains. Let the item sit in the sun as it dries, and reapply the mixture as needed until the spot disappears. • Shine chrome bathroom fixtures Run the cut side of a lemon over faucets, drains, and more to remove mineral deposits and make 'em sparkle. Rinse and dry thoroughly when you're done. • Remove T-shirt sweat stains Fight those troublesome set-in stains by rubbing them with lemon juice (vinegar works well, too) before you toss the clothing in the wash. • Kill weeds Spray any garden offenders with a little lemon juice to banish them from your yard. But keep the juice away from the plants you want to keep — the acidity could damage or kill flowers and bushes, too. • Create a makeshift scented humidifier Simmer a saucepan of water and some lemon slices (and other aromatics, if you like) to combat dry indoor air, and make your home smell nice in one punch. • Clean a cheese grater Can't free the last bits of cheddar from your grater's holes? Run the flesh side of cut lemon over the tool to help cut through and free the residue. Professional Cleaners

Split finishes for brassware isn’t new, but the trend has begun to grow in the last few years. A split finish allows you to introduce more than one colour into the colour palette of a space for a versatile and dynamic look. Here at The Watermark Collection, every mixer is made to order in our Brooklyn factory. Because of this, designers and architects regularly come to us when their request is outside the box. So trust us when we say: split finish is a growing design trend. In celebration of this create-your-own movement, we’re highlighting five of our favourite split-finish mixers. 1. Dueling Textures When most people think of split finishes, they’re envisioning colour alone, usually remembering the most common split of decades ago: the brass and chrome look. But split finishes don’t have to be confined to traditional metal tones or a single texture. This mixer features a matte black finish over the majority of the spout, with an accent of weathered bronze on both the spout and the handle. The difference in texture helps ensure that the mixer will fit into a larger range of bathroom styles, from super contemporary to more rustic designs. The texture of the mixer can be paired with a textured tile or contrasted with something sleek to make it stand out. The possibilities are endless when you start playing with not only colour, but texture in one design. 2. Pop of Colour Contemporary designs use bold and unexpected colours to elevate a room’s style. One way to include a surprising pop of colour is right on the mixer. The spoked handle on this faucet and shower valve is vivid electric blue that pairs beautifully with either polished or brushed nickel. The industrial design makes the colour stand out more, allowing it to become a focal point in the room and giving you a built-in palette to play with. 3. Understated Style Sometimes a muted finish like this matte black and aged brass can give you the subtle lift your design needs. The warm contrast in tones on this contemporary mixer helps create a dynamic design, while the consistent aged finish ensures the mixer doesn’t call attention away from other elements in the room. These colours also ensure that you have a wide range of materials to choose from to complete the rest of your space with ease. 4. Sleek Design No matter what style of bathroom you have, it’s hard to go wrong with clean white as your dominating colour palette. White floors, wall tiles, sinks and vanities have been used for decades to give bathroom designs a clean, consistent style. For the contemporary spaces that needs a bit of drama, a split-finish design that pairs this white mixer with just a touch of chrome adds polish and the right amount of contrast. The chrome finish also helps to pull in other design elements like door knobs, hinges, and flush levers. 5. Decadent Design Using black in bathroom designs is one the best ways for designers to make a luxurious and elegant impact. What better way to complete the look than with a black mixer with a soft, slightly matte finish? For truly decadent style, pairing a matte black spout with an aged brass handle and accent can turn your design into something extraordinary. That touch of brass also allows designers to include other warm touches in the rest of the space, from mirror frames to towels and throw rugs. Split Finishes: The Designer’s Secret Weapon Split finishes can be created out of nearly any combination of colours or textures. They can also be used on a variety of mixer styles and shapes from the traditional to the contemporary, allowing you to put your personal stamp on your bathroom design. If you want to kick your design up a notch or two, don’t forget to consider split-finish.

Yes, tap. Lived a few years in the US and it seems to have rubbed off on me (so many people there say faucet for tap) 😄