The Problem of finishing preparation consists in making a surface of a product as much as possible equal and smooth, at the same time to provide strong coupling of a colourful film with wood. Often enough observed rastreskivanija, the peeling and paint backlog occur in most cases as a result of infringement of technology of a spadework. .
Except such operations as repeated zachistka wood the cutting tool, podmazka pastes, grinding by a skin and pumice, finishing preparation provides a first coat of a surface and obessmolivanie wood (the last concerns wood of coniferous breeds). .
Operations of finishing preparation under opaque coverings are made in the following sequence: obessmolivanie, priming, podmazka end faces, continuous shpaklevanie, polishing (two last operations repeat in some krasnoderevnyh works till 12-15 time). After each of these operations long drying is obligatory. .
On colourful coverings sometimes there are stains. It is result of interaction of paints and varnishes with acids and strong alkalis which can be a part various priming and shpaklevochnyh of structures. .
Paints and varnishes badly stick to strongly resinous wood. For obessmolivanija apply an acetone solution in water 1:3 or a mix of acetone and washing soda 1: 4. It is possible to manage one warmed up till 60-70 ° a soda solution. A wood surface wipe a rag or a brush moistened in one of these solutions, then warm water carefully wash off the rests of alkali and allow surfaces to dry up. .
Usually wood at obessmolivanii darkens, for opaque coverings this circumstance has no value.