PPG Industries (NYSE: PPG) has announced several executive appointments that are effective Aug. Frank S. Sklarsky, executive vice president, finance, will be appointed executive vice president and chief financial officer, as previously announced, and will continue to serve on PPG’s executive and operating committees. Sklarsky continues to report to Chairman and CEO Charles E. Bunch and to be based at PPG’s global headquarters in Pittsburgh. David B. Navikas, senior vice president…