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wood preparation

Wood, a noble material, often deserves a different treatment than painting. Shutters, panels, friezes, paneling, furniture and wooden trinkets can take on a completely different aspect when they are tinted, stained and / or varnished.

A wide range of wood finishing and maintenance products are available commercially.

Wood finishing and maintenance products

The number of products for the finishing or renovation of wood is very important and the manufacturers compete with imagination for the trade name of their ranges. However, it is often only basic products: strippers and strippers; dyes and tinting treatments; stains; finally, varnishes and waxes. Added to this are all traditional cabinetry products, such as meals and specialty polishes.

Preparation of new wood

Coating or mouth pores liquid prevent the wood from drinking too quickly the application products.

Pore ​​clogging

New wood (or "white" wood for some species) must be at the same time perfectly smooth (by sanding) and prepared so that it does not react to the treatment of which it will be the object. Its pores must, in particular, be plugged so that it does not drink a large part of the application product and that it does not react by saturation of the pores and swelling of the fibers (it is said that the thread "rolls up").
The "clogging of the pores" is done:

  • with a coated end or by application of a diluted sublayer. A fine sanding allows in any case to obtain a smooth surface clean decoration
  • with a liquid product, brushed, which closes the pores by capillarity.

Preparation of old wood

Steel wool, used as a buffer, allows the removal of wood on which successive layers of wax have been applied for years.

Dewaxing with steel wool

The old wood must be stripped, decimated so as to get rid of everything that clogs it.
There are many solutions depending on the state:

  • classic cleaner if the furniture is painted or varnished
  • furniture stripper, aiming to completely rid the wood of accumulated layers of wax
  • Wax &, if the furniture is only dirty with polish and wax
  • steel wool, to clean the wood, with a furniture cleaner and a scourer, knowing that steel wool can also be used to strip marble and metal objects
  • Sandpaper (with a sanding wedge for the flat parts) to put the wood completely bare (possibly followed by a passage of steel wool to obtain a very fine polish before treatment).

Treatment against larvae of xylophagous insects

The injection of insecticide product makes it possible to fight effectively against larvae of xylophagous insects.

Treatment against woodworms

A treatment against larvae of xylophagous insects (literally "wood eaters") is a good protection:

  • on new or recent wood (often combined with a tinting product)
  • by injection, under pressure, with an aerosol spray, for the old woods already infested (by the "worm" holes).

Clogging of cracks

The wood paste is applied to the painter's knife to fill holes and cracks.

Use of wood pulp

The filling of cracks and wormholes with wood pulp makes it possible to find a flat and smooth surface suitable for dyeing and any other surface treatment (including painting). The wood pulp is a synthetic product whose consistency is close to that of the coating.
It is applied to painter's knife, in one or more times depending on the size of the defect to be covered (in the case of a large crack, we can first begin to fill it with paper mache or a small piece of string):

  • brush the wood to remove the dust from the flaw
  • apply the paste by forcing it to the painter's knife
  • allow to dry completely (the product tends to shrink while drying)
  • add a second layer if the slit or hole is not completely closed due to the removal of the paste
  • sand after drying (the product is as hard as wood).

It will be noted that a refilling with wood pulp always leaves traces (even if one has taken care to choose a paste indicated as being of the same shade as the wood), if one is satisfied to treat the wood or to varnish it with a colorless varnish. In some cases, it is better to tolerate a hole or crack than to have a very obvious repair.

Resection of large wood defects

Repair pastes are used to treat the biggest defects.

Use of repair paste

Major defects, such as splinters in the sculptures, can also be repaired, with a little skill. The product that is presented as the modeling clay, first with a painter's knife, then eventually with the fingers to reform moldings and patterns. Some of these products are two-component, two pastes of different colors, which must be kneaded until a uniform hue. Then you have to let the dough dry completely so that it becomes as hard as wood. The moldings and patterns can then be sanded, but also carved like wood (the wood pulp however unravels the tools). It is possible to paint it, to tint it, knowing that the repair will often appear darker than the rest of the wood if the dye is clear.

(photos / visuals: © DIY-Prod, except special mention)

How to prepare and maintain wood: furniture

On the same topic

  • DIY tips
    • Wood varnishing: products and techniques
    • Use a teak oil for garden furniture
    • Wood stripping
    • "Natural" stripping of painted or varnished woods
    • How to strip and treat a piece of furniture?
    • Apply a stain on a piece of furniture before finishing
    • Use wax to maintain a piece of furniture
    • The xylophagous insects
    • How to strip a paint on wood

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