SPACE BY CRAIG SWAIN PYRITES INVADING YOUR ASPHALT INVADERS I f you recently had your parking lot seal coated, striped, or even had your sport surface color coated and were disappointed with brown spots or white stains appearing, you are not alone. Sorry to say, you cannot blame the contractor that did the work. These unsightly and menacing stains are unfortunately becoming very common. Typically, they are there prior to the coatings being applied. The stains did not stand out on oxidized pavement (gray), a worn line, or faded court. Their appearance is enhanced after a fresh new coating is applied. June 2017 23