DUSTING
a) Dusting is to shake a product in powder form through a sieve over whatever you are decorating. It is usually performed over damp clay, as this will absorb and hold the powder, but it can be done over bisque with dry colors and glazes. It is very delicate, so be very careful when moving it and keep it away from drafts.
b) Dusting is to clean by rubbing a dry cloth or soft brush over a surface that is dry but covered with a layer of dust.