1. For the 23 windows requiring full restoration, the windows should be carefully removed from the building and labeled as to their location. There is no parting bead in the jambs. The window openings should be filled in with a secure, temporary, weatherproof material like plywood while the sashes are out of the building. If any interior paint is damaged during the removal process it should be repaired. This may require paint matching if the museum does not already have the color on hand in their paint collection. 2. The exterior jambs (parts exposed to exterior weather) and sills should be stripped, repaired as needed, and repainted with an oil-based primer and two latex top coats. It is preferable to leave these items in the building and use heat (no open flame) or chemical to strip these elements. Note that the windows are on all three floors of the building across the entire façade and on portions of the two sides. 3. Once removed, the wood sashes should be stripped completely of putty and paint and glass should be removed. The windows do not appear to need extensive wood repairs but there will be some areas that likely have localized rot and require epoxy or wood filler. 4. There are a few pieces of glass that are broken. The contractor should make the effort to avoid breaking glass, although it is understood that some amount of breakage is normal. Broken glass pieces can be replaced with regular modern glass. 5. After being stripped and repaired, the wood sashes should be cleaned with a very mild soap solution or plain water. After drying, the wood sashes should be treated with a 50/50 mixture of boiled linseed oil and mineral spirits (or turpentine), including the rebates where the glass sits, so that the wood will not pull oil from the putty. Glass will be reinserted after the oil treatment and secured with glazing points. The UV film on the glass is on the inside of the windows and can remain.
