![Concrete polishing contractor Sustainable Flooring Solutions of Vancouver, Wash., used a seven-step polishing sequence on the 80-year-old concrete slab at the Valley Art Association Gallery in Forest Grove, Ore. Project size: 4,000 square feet. Key products and equipment: HTC grinder, SASA Company abrasives, Lythic Solutions densifier.](https://img.forconstructionpros.com/files/base/acbm/fcp/image/2012/01/valley1_10612117.png?auto=format%2Ccompress&fit=crop&h=288&q=70&w=512)
Concrete polishing contractor Sustainable Flooring Solutions of Vancouver, Wash., used a seven-step polishing sequence on the 80-year-old concrete slab at the Valley Art Association Gallery in Forest Grove, Ore. Project size: 4,000 square feet. Key products and equipment: HTC grinder, SASA Company abrasives, Lythic Solutions densifier.