I can't help with the Stuck on Stucco article but Dave Rowe is/was an exponent of this technique using the Das modelling compound. Look out for his book Architectural Modelling in 4mm Scale ISBN 0 906867 12 6, Wild Swan Publications, my copy is of 1983 vintage.
See also his book Industrial and Mechanised Modelling ISBN 0 906867 84 3, Wild Swan Publications 1990.
I believe I'm correct in saying that he and his wife Shirley produced a superlative scale model of a corn mill that was about to be demolished in Devon (?) and was written up in the American Narrow Gauge and Short Line GAZETTE magazine. Finally I remember seeing a wharf scene with a moving bridge, trackage and goodness knows what else at a railway modelling exhibition.
Are they still modelling?