WD-40 Co. WDFC shares fell in the extended session Thursday after the maintenance and cleaning products company topped Wall Street estimates for the quarter but its earnings forecast for the year didn’t. WD-40 shares dropped as much as 4% after hours, closing the regular session virtually flat at $178.61. The company reported fiscal second-quarter net income of $16.5 million, or $1.21 a share, compared with $19.5 million, or $1.41 a share, in the year-ago period. Revenue rose to $130.2 million from $130 million in the year-ago period. Analysts surveyed by FactSet had forecast $1.15 a share on revenue of $125.8 million….
