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Yes, Corian® and other solid surface countertops can be cut with standard woodworking tools like a circular saw or a jigsaw, but using the correct blade is crucial for the best results.

The recommended blade is a tungsten carbide-tipped blade, often called a solid-surface planer or triple chip grind blade. This type of blade is hard enough to cut through the material effectively. For a jigsaw, a fine-tooth down-cutting blade should be used.

It is important to note that a diamond blade is not necessary. Diamond blades are designed for harder materials like natural stone, concrete, or brick, and Corian is not a natural stone.

Using blades designed for wood is not recommended as they can cause microfractures that weaken the countertop's edges. While a tungsten carbide blade provides a much cleaner cut, the resulting edge will still be rough and must be sanded and smoothed to prevent microfractures from developing over time.

Original Gorilla Glue is not a good choice for laminate countertops. It is not a contact cement, which is the best choice for this material, and it does not explicitly state that it should be used on laminate. Perhaps the best reason to avoid using Gorilla Glue on laminate is that it expands three times its original size, which could lead to your laminate being pushed away from the countertops.

Solid surface countertops are fairly resilient. You can use soapy water or ammonia-based cleaners. You can also occasionally use diluted bleach (around 5 tablespoons per gallon of water) for sanitization. Avoid window cleaners because they leave a waxy film that can dull the countertop’s surface. Solid surface material is nonporous, so there’s no need for sealing.

Yes, you can install a new layer of laminate over an existing laminate countertop, which can save you time and money while updating its appearance. The process is similar to installing laminate directly onto particle board. First, clean the existing countertop thoroughly. Next, fill and sand any cracks or damaged areas. Then, you'll need to sand or scratch up the entire surface to help the contact cement or glue adhere properly. After applying the adhesive, you can install the new laminate layer on top. If you're looking for other ways to improve your existing laminate countertops, you could also consider painting them or applying an epoxy finish.