 Shares of PPG Industries Inc. PPG, 1.10 rose 2 in the extended session Thursday after the paint and coatings maker reported first-quarter profit and sales above Wall Street expectations and said it will increase prices again to fend off rising prices for raw materials and other costs increases. PPG said it earned 18 million, or 8 cents a share, in the quarter, compared with earnings of 378 million, or 1.58 a share, in the year-ago period. 