Have you seen/read "using natural finishes" by weismann and bryce. I've read a bit lately, and particularly like this one. Its borrowed, but worth buying. What you applying it over. I been increasingly interested in this lime and earth plasters, since with used clay finish on our walls in an addition. the book mentions:@ lime aggregate coverage- scratch 5gal. to 2.5msq thickness 10mm; straight coat-5gal. to 4msq at 6mm thick; finish 5gal. to 6msq at 3mm thick.

Brandon