Scrubbing Bubbles Ruined Marble . Brass fixtures are coated with a clear acrylic to prevent tarnishing. Steps wet the surface of the countertop. Scrubbing Bubbles Mega Shower Foamer reviews in Bathroom Cleaning from www.chickadvisor.com When this time elapses, trigger the cleaner and let it perform its duties. Apparently scrubbing bubbles contains chemicals that can weaken the structural integrity of acrylics leading to premature tarnishing of the fixtures. Avoid using harsh chemicals, which can damage the surface.