Some painters white over thin boards wth whitening sized & when it is dry they white it over againe, & when that is also throughly dry, they dip the ball of there hands sometimes in water & smoothe it over by rubbing these hands round about ye till it be smooth for it will make it very smooth, Others white there boards withe whitening sized then being dry they scrape it, & then white it over againe with off thiner whitening, and scrape it againe, this they doe threse before they prime it.