Window sash spot paint maintenance prevents wood deterioration.See the book Save America's Windows http://www.historichomeworks.com/hhw/reports/reports.htm#Windows Join us at the Historic HomeWorks windows discussion forum: http://historichomeworks.com/forum/viewtopic.php?p=8453 See the other videos in the series: http://www.historichomeworks.com/hhw/video/rftf.htm#Reports Learn how to repair, maintain and restore older and historic windows at my workshops and training sessions: http://www.historichomeworks.com/hhw/education/seminars.htm Copyright 2010 John C Leeke Less