ᐅ Refreshing the Color of a BILLY Shelf: How to Paint It Properly?

Created on: 27 Dec 2024 08:31
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parelijah
Hello everyone,

I recently bought a BILLY shelf from IKEA and would like to repaint it in a different color. Since the shelf is made of particleboard with a foil coating, I am unsure about the best way to paint it so that the paint adheres well and the surface looks smooth and even.

My questions are:

1. How should I best prepare the BILLY shelf – is sanding enough, or do I need to remove the foil?
2. Which type of paint works best for this material (e.g., acrylic, alkyd, spray paint)?
3. Should I use a primer before painting, and if so, which one?
4. What should I keep in mind when applying the paint (number of coats, drying times, temperature conditions)?

I would really appreciate detailed guidance or any experiences with painting a BILLY shelf. Thank you in advance!
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Domau0
27 Dec 2024 12:30
A few details about your project that are often overlooked:

The most important aspect is surface preparation. Since Billy is made of melamine-coated particleboard, this surface is extremely smooth and has very low porosity. This means paint will hardly adhere without proper pretreatment.

1. Preparation:

- First, empty the shelf and, if necessary, disassemble it to reach all areas easily.
- Clean the surface thoroughly with a mild solvent (isopropanol or a special degreaser) to remove all grease and residues.
- Sanding: Use 240-grit sandpaper and lightly sand the surfaces. The goal is to create a matte roughening, not to remove the melamine coating.

2. Primer:

- Use an adhesion primer designed for smooth surfaces (products labeled "for melamine" or "for plastic"). This acts as a bonding agent between the coating and the paint.

3. Painting:

- For furniture, acrylic or alkyd enamels are suitable. Acrylic paints have less odor and are more flexible.
- Apply several thin coats (at least two, preferably three) to avoid drips and unevenness.
- Lightly sand between coats with ultra-fine sandpaper (320-400 grit) for a smooth finish.

4. Drying and curing:

- Paints require not only surface drying but often several days for full curing. Follow the manufacturer’s instructions and avoid handling during this period.

My question for you: What type of finish are you considering? Matte, glossy, metallic? This will also affect the paint system and the preparation needed.
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parelijah
27 Dec 2024 13:08
Thank you for the detailed answers so far, they've been very helpful!

@Domau0: Thanks for the question, I would like to use a matte white. The shelf should look modern and very unobtrusive.

@KAULIS and @Domau0 mentioned that sanding is only for roughening the surface. I have heard that some recommend cleaning agents with alcohol or spirits before painting to remove grease and dust — is this really necessary, or is dusting enough?

Also: Is it better to use spray paint from a can, or to work with a brush/roller? I have no preference but want an even finish without visible brush strokes.
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Kinbu
27 Dec 2024 13:42
Hello parelijah,

Your question about whether to clean with alcohol or denatured alcohol is very valid. Cleaning with isopropanol or denatured alcohol before painting is indeed helpful because invisible oils from hands or the environment often remain on the surface. These can affect the paint’s adhesion.

Wiping off dust alone is not enough. It’s best to wipe the surface with a lint-free cloth slightly dampened with alcohol and let it dry completely before you start sanding and priming.

Regarding the choice between spray can and brush: if you want a very even finish without brush marks, spray paint is recommended. However, this requires a well-ventilated room or, ideally, an outdoor area.

If you work with a brush, use high-quality, soft brushes and apply thin, even coats to minimize brush strokes.

Many painters also recommend a foam roller for very smooth surfaces, especially with acrylic or powder coatings.

Which room are you using for painting? I’d be happy to offer tips for the environment.
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Davidleo
27 Dec 2024 14:16
Kinbu schrieb:
It’s best to wipe the surface with a lint-free cloth slightly dampened with alcohol and then let it dry completely

Exactly! So far, I’ve only cleaned with denatured alcohol – it really feels like the paint adheres better. 🙂

And spray cans are great! Especially for furniture. No brush marks, fast drying, and ergonomic application.

Important: Always spray from about 20-30 cm (8-12 inches) away, applying thin layers rather than one thick one. Otherwise, the paint can run!
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sanjon
27 Dec 2024 15:00
Alcohol for cleaning, yes. Spray can for even paint coverage, yes.

Brushes can leave streaks if you are not experienced.
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Jensson
27 Dec 2024 16:22
I’m adding a brief step-by-step guide:

1. Disassemble the furniture so you can paint all surfaces.
2. Clean the surface with isopropanol to remove grease and dirt.
3. Lightly sand with 240-grit sandpaper to create a good base.
4. Remove dust, ideally with a slightly damp cloth, then dry the surface.
5. Apply a primer specially designed for melamine or plastic.
6. After the recommended drying time (always check the manufacturer’s instructions), perform a fine intermediate sanding with 320-400 grit.
7. Apply the first coat of paint thinly and let it dry thoroughly.
8. If needed, apply 2-3 coats of paint, remembering to allow drying time and do intermediate sanding between coats.

Common mistakes to avoid:
- Applying too thick layers, which causes runs.
- Insufficient drying time, preventing the paint from curing properly.
- Not completely removing sanding dust, resulting in uneven spots.

For this type of work, I usually use an acrylic-based paint and apply it with a high-quality foam roller – the result is very smooth.