I am having the exterior of my house painted. My contractor says it is his standard practice to paint the double-hung window tracks. Logically, that is a problem for me since I feel that will reduce the available space between the window and the track and will therefore cause sticking problems. Can anyone suggest an authoritative source on the web for information about this? I've tried searching the web and numerous sites. I've found one source that says don't do it but I'd feel better with more opinions.