A polyurethane results from the chemical reaction between a polyol resin (also known as the base, or the “Part A”) and a poly-isocyanate curing agent (also known as the hardener, or the “Part B”). The resin type can be modified with polyester, polyether or acrylic. The polyurethane chemical structure is highly cross-linked and has a very large molecular weight. In paint, the polyurethane polymer offers a tough and durable coating that is highly resistant to extremes of weather – intense sun, wind and precipitation. The polyurethane also allows the paint to be formulated to higher gloss levels, offering a beautiful and consistent finish. The higher gloss level also allows improved “self-cleaning” – that is, dirt and dust washes off during rain, and residual dirt can be easily removed by detergent and water. Graffiti can also be removed from the smooth surface using proprietary cleaning agents.