Base on the knots, application of shellacvarnish resin parts closed, oily putty inlaying nailhole place application.
基层上的节疤、松脂部位应用虫胶漆封闭，钉眼处应用油性腻子嵌补。
2
If you use colour stain, can say take alcohol solution dye 6 points, alcohol 70 points and shellacvarnish 24 points, mixed evenly, with manual brush or spraying dyeing.
Initial heating of the phenol and formaldehyde (in the presence of an acid or base to get the reaction going) produced a shellac-like liquid good for coating surfaces like a varnish.