Question

Can debri from sanding cabinets cause etching on the granite countertops below? Painter caused damage to granite by sanding the varnished cabinets above the granite causing etching which we can’t get rid of. Can sanding Polyurethane can cause this?

Answer 1

Yes, debris from sanding cabinets can potentially cause etching on granite countertops below. When sanding varnished cabinets, fine particles of dust and abrasive materials can become airborne and settle on nearby surfaces, including granite countertops. These particles may contain substances that can scratch or etch the surface of the granite.

Granite is a natural stone composed mainly of quartz, feldspar, and mica. While it is a durable material, it is not completely impervious to damage. When abrasive particles come into contact with the granite surface and are dragged or rubbed across it, they can leave scratches or etch marks.

Polyurethane, which is often used as a protective finish for cabinets, can contain abrasive components and may contribute to the etching problem if it is sanded without proper precautions. The sanding process can release polyurethane dust and debris that settles on the granite and may cause damage when in contact with the surface.

To avoid this issue, it's essential to take precautions when sanding cabinets above granite countertops. Here are some steps to minimize the risk of damage:

1. Cover the granite: Protect the granite countertops by covering them with drop cloths, plastic sheets, or any other suitable material that prevents dust and debris from settling on the surface.

2. Seal off the area: If possible, isolate the work area to prevent the dust from spreading to other parts of the house.

3. Use proper ventilation: Ensure that the work area is well-ventilated to help disperse airborne particles and reduce their concentration on surfaces.

4. Clean thoroughly: After completing the sanding process, carefully clean the area and remove any debris that might have landed on the granite countertops.

If the granite has already been etched or scratched due to sanding debris, you may need to consult with a professional stone restoration specialist to assess the damage and determine if it can be repaired. Additionally, using appropriate cleaning and maintenance techniques for granite can help keep the surface in good condition and reduce the risk of future damage.