I've got a boatload of window panes to replace in an old house I recently bought. About half are on the second floor and must be done from a ladder. Making it worse, most of the glazier putty is in great condition. What's your best advice for approaching this task (other than hiring someone, I'm getting quotes of $25-30 per pane). Will I be able to take useful measurements before removing the glass, or do I have to take out the glass, scrape out the rabbet, measure, duct tape up the opening, go buy the glass, bring it home, put it in, and move to the next one? Is there a more factory-assembly-line efficient way to approach this?
Also, what's my best bet for fast removal of the old glazing putty?