Brush polystyrene with solvent-free paint

Styrofoam painting is possible in principle, but always has a bit of the principle of trial and error. The foamed polystyrene does not tolerate solvents. Water-based paints and varnishes are suitable in addition to resin products. The absorbency of Styrofoam can be very different and must be tried.

Difficult pre-cleaning

Naked styrofoam can be painted with solvent-free acrylic or emulsion paint and painted over. The sensitivity of the plastic polystyrene makes it often difficult to achieve a grease-free surface. Old surfaces, especially on ceilings, can only be processed to a limited extent. Almost all fat-dissolving agents also attack polystyrene.

If very old soiling and / or traces of smoke are present on the styrofoam surfaces and polystyrene panels, the most thorough possible cleaning with special agents must be carried out. As a home remedy recommend relevant forums soda water, which is sprayed on and removed with a soft mop. Before painting, a so-called nicotine stop, also called shut-off paint, is applied as a primer. This layer prevents the subsequent formation of "clouds".

Acrylic paint suitable for all initial conditions

Styrofoam surfaces must be smooth and crack-free to be painted. Damaged Styrofoam can only be repaired by filling it with full surface. The surface must be hardened and smoothed at the same time.

If the Styrofoam is covered with plaster, as in model making, acrylic stains are just as good as Styrofoam. Old already applied styrofoam coatings can easily be painted over. New products such as Styrofoam strips for ceiling decoration are usually pressed by the manufacturer so that their color absorption and their absorption behavior are more uniform than with pure insulation materials.

That's how you stroke polystyrene

  • Acrylic or emulsion paint
  • water
  • soda
  • cleaning mop
  • feather duster
  • Schaumrolle
  • Brush with tight soft bristles
  • Maybe wire brush

1. Cleaning

Remove dust with a feather duster. For fat and nicotine, spray soda water or a special product. "Wipe" the surfaces with a mop without applying pressure to the Styrofoam.

2nd barrier color

If you paint styrofoam attached to the ceiling, you should apply a blocking color, also as isolation paint or nicotine stop in the trade.

3. First coat

Dilute the paint as much as possible so that it remains coatable. The thin liquid runs into the pores and bumps of the styrofoam. Expect two to three strokes with a soft bristle brush.

4. Second coat

Change the mix ratio with water so that the color is about halfway between the highest possible thinner and topcoat consistency. Enter this step once or twice. At the last primer, the coverage should be nearly even.

5. cover layer

"Thicken" the color as much as possible and create a creamy texture. Apply the cover layer in a cross shape with a foam roller.

Tips & Tricks

To achieve an optical effect similar to a fine plaster, you can roughen the surface of the polystyrene with a wire brush.

Product Image: Vietnam Stock Images / Shutterstock

Video Board: How to spray paint Styrofoam without melting (Non foam safe)