Another possibility is to mix the tinting colours in a stronger size of polyvinylacetate emulsion (Elmer's Glue is a good example of this material). If this mixture is thinned way down to the consistency of skimmed milk (with cold water), it will give probably a better bond than glue water. A colleague of mine has suggested that if you wanted to stabilize all of the blue areas, you might wish to experiment with this material in some obscure corner first. It would have to be put on with a soft brush, and of course if you wished to do all the walls this way it would be necessary to write to a company like Borden's which manufactures this material and find out what the wholesale price of a drum of Polyvinyl acetate emulsion is. Of course this would be a time-consuming job, and a bit expensive; but I mention it as about the only practical material which might work if there aren't too many layers of paint on the surface. Incidentally the wet colour of the emulsion-tinting colour mix will probably be different from the dry tone; so be sure to experiment before you paint in the patched areas.
The brown lower panels seem to be oil paint. The loose paint here will have to be brushed off and the blank areas sized before new paint is applied.
The altar mural should have only losses patched and in-painted. Do not anyone over-paint what is there, in order to make it look "better than new".
Some of the wood areas around the windows may need a coating of "Pentide", "Woodlife", or "Decaysnot", and some paint to preserve them.
Per E. Culdbeck [New York State Historical Association, Cooperstown, N.Y.]
2/3/2022 Transcription of original undated document, courtesy Cobblestone Museum.
Editor's Note: The content of the above transcription was copied from a longer circa 1960's document which was a list of suggestions for buildings of the Cobblestone Society. Please be aware that these suggestions are based on what was known and available in the 1960's, and the advice was specific to the unique needs of the Cobblestone Society's effort to restore their cobblestone buildings, fixtures and furnishings. Be advised to consult with a restoration expert if you wish to do similar work. Today's products and techniques are very likely safer to use when instructions are followed, and be either environmentally friendly, or have detailed use warnings and disposal instructions if hazardous.