Roughen wood surfaces efficiently

The roughening of wood is an important prerequisite for a well-adhering paint, whether with paint, wax or oil. A rough surface offers better adhesion possibilities for paints and binders, but the woodworking should be well-dosed: If the substrate becomes too rough, it is no longer possible to produce a smooth paint surface. Things are different if you want to roughen wood in order to make it age visually.

Roughen wood before painting

Raw, planely smooth wood surfaces, but also wood painted with an old coating, should be roughened with paint before re-treatment. Particularly suitable for this purpose is a medium-fine sandpaper. Here is a quick guide:

  • Clean the surface so that the sandpaper does not become clogged with dirt
  • Grind the substrate in the direction of the barrel
  • with flat surfaces, take a sanding block to hand
  • for buckles and profiles use sanding sponge
  • work larger smooth surfaces with orbital sander
  • Eccentric sander well suited for fine work
  • Delta sander is particularly suitable for narrow corners
  • When grinding, apply little pressure
  • Use grain size between 40 and 60
  • remove the wood after rough grinding

If you want a finer sanding result, moisten the wood surface after the coarse sanding and let it dry. This is followed by another grinding pass with finer paper: this can be very useful, for example, as a preparation for oiling. After dusting, the painting takes place.

Roughen wood for patination purposes

The roughening of wooden surfaces serves in some cases for purely optical purposes, for example in the patination, so the "up-old trimming". For example, use a soft brass wire brush to work the wood.

This creates pits on the soft, lighter annual rings - the hard dark rings are worked out plastically. If the wood is then flamed or stained dark, a nice antique effect is created.

Roughened surfaces by rasps

Even with the wood rasp, surfaces can easily be roughened, for example to create an art object or to create interesting visual effects on furniture. Actually, the rasp is used to remove excess layers of wood before smoothing.

Tips & Tricks

Painted wooden surfaces can also be roughened with chemical agents before the new painting, which saves time and energy. However, this variant is slightly more expensive and can be associated with pollution.

Video Board: Festool Rotex 125, sanding from rough to a polish finish...