The Making of the Glencairn Methuselah Window: Page 74
See also page 281-282-283
April 12, 1928
system actually followed for doing Annunciation Panel for Chancel Clerestory.
I mixed 3 parts Modelling Backing and
I spattered the above material on the back of the glass using a bristle brush such as artist’s paint with about this size <fig.23 brush head>. I got the paint onto the brush and hit the furrel on the palette knife <fig.24 shows technique>. This keeps too many fine particles from falling ont the glass. This dries pretty quickly – afterward I took a bristle brush and rubbed over the back to make clear spaces here and there.
Following the above I spattered on with a tooth brush as I recollect,
over to p.274.