The work gilding mixtion imposed on a carefully prepared, well-dried soil, insulated (usually shellac) using a flat brush, a thin layer. High skill required to determine the moment when mixtion is ready for bonding metal flakes. It can not be too wet, because then flake "tone", and not too dry not stick to. Actually mixtion should not stick when touched up and with a swift drag your finger on the surface seem characteristic wheezing sound.
Technique golding for mixtion little sensitive to weather conditions, was therefore applied both indoors and outside.