Check out my story about how long a paint job lasts and why, at the Historic
HomeWorks library:

http://www.historichomeworks.com/hhw/qa/qa07.htm

You'll also find a series of paint and coatings articles that might be
helpful:

http://www.historichomeworks.com/hhw...ry/library.htm

John
by hammer and hand great works do stand
www.HistoricHomeWorks.com