To the surface

It is necessary to apply varnish to the surface with a swab, and, without gripping it in a varnish, but pouring inside. It is best to apply varnish with a spray, using a vacuum cleaner. For the best effect, the varnish is applied to several tricks, several layers over a certain period of time, but nitrolak can be applied with an interval of 10-15 minutes. The darker you want to get a shade of wood, the more do the intervals between varnishing sessions.