Cast iron sink? did I read it correctly. I guess you would need customisation. Thanks Nitin Cornerstone Designs, Bangalore.

Steel inlay will increase your problem manifolds. Have suggested an alternative on your duplicate post. Thanks, Nitin Cornerstone Designs, Bangalore

Kavita, You may be in luck, there is a quick and easy fix for the eyesore. Look for a product called Self adhesive caulking tape. But please get a decent professional to install it this time. They save such issues. Thanks, Nitin Cornerstone Designs, Bangalore

Try to keep a band ( designed metal or board ) around the sink on three sides , which can makes the water spill less on that three sides ....or try to keep a rectangular hole on corners around sink for slab which doenst look like hole and get a decorative cover for that, and connect that to the outlet at down...so that its easy to push water around the sink so that it drains... Or get an extra slab just to place around sink where water spills and place it on top of existing slab if you don't want to remove the existing sink and place...