3. Filling seams is one of the most straightforward jobs you will take on! The design of your kitchen and the extent of the damage will determine the way that the repair will have to be done. Hard water buildup in your countertops can lead to an overall unsightly appearance and even result in the organic buildup and scaly residue on your quartz surface. Use a toothbrush, or other soft-bristled brush, to scrub at the stain. If nothing seems to work, you can always try a poultice or extractor made especially for granite. A seam will always be something you can both see and feel, no matter how great the installation or design is. password. How to Make a Seam When Installing Pieces of Laminate on a Countertop