ᐅ Painting a Billy Bookcase – Step-by-Step Guide

Hello everyone,

I want to paint my Billy shelf because the surface already has some scratches and discoloration. It's important to me to achieve a clean, durable, and as even a coat of paint as possible. Not too much detail, but a smooth and long-lasting finish.

My questions are:

1. How should I best prepare the Billy shelf – is sanding absolutely necessary, and if so, what grit is recommended?
2. Which type of paint is ideal for MDF or particleboard (depending on what the shelf is made of)? I am leaning toward acrylic paint but am unsure.
3. How much drying time should I allow between coats?
4. Are there any special techniques to avoid drips or unevenness, especially on vertical surfaces like the sides of the shelf?

I look forward to your step-by-step experience tips, including advice on tools (roller, brush, spray can) and possible pitfalls.

Thanks in advance!

elbibar schrieb:
How should I best prepare the Billy shelf – is sanding absolutely necessary?

Yes, sanding is the most important preparation step to ensure proper adhesion of the paint. For MDF or particleboard, fine sandpaper with a grit of 180 to 220 is sufficient to even out the surface and remove any old paint residues or dirt.

elbibar schrieb:
Which type of paint is ideal for MDF or particleboard (depending on what the shelf might be)? I am leaning towards acrylic paint.

Acrylic paint is a good choice because it is low-odor and water-based. It is important to use a paint designed specifically for wood and furniture. Alternatively, polyurethane or two-component (2K) paints are available, which are especially durable but more complex to apply.

Allow at least 4 to 6 hours drying time between coats, following the manufacturer’s instructions for the specific paint.

Regarding technique, I recommend using a high-quality foam roller for large surfaces, as this avoids brush marks. For edges and corners, a good-quality flat brush is ideal. It is important to apply the paint thinly and evenly, and when painting vertical surfaces, use several very thin layers to prevent runs or drips.

Summary of steps:
1. Sand carefully (grit 180–220).
2. Remove dust thoroughly (e.g., with a damp cloth).
3. Use a primer if the MDF is very absorbent.
4. Apply paint in thin layers.
5. Observe drying times.
6. If needed, do a light sanding between coats with very fine sandpaper (grit 320) for better adhesion of the next layer.

This is the standard procedure that will help you achieve durable results.

elbibar schrieb:
I’m looking forward to your step-by-step tips based on experience

I’ll give you a detailed guide with some often overlooked points:

1. Disassemble the shelf and lay out the parts – it’s easier to paint them flat on the floor.

2. Sanding is essential, even if the surface feels slightly roughened, because paint won’t adhere otherwise. For MDF, start with grit 120, then follow up with 220 grit. MDF edges are often rough; here you can also use a damp sponge to reduce dust.

3. Remove dust thoroughly – make sure to vacuum well and wipe everything down with a damp (not wet) cloth.

4. Apply a primer: use a special MDF primer or wood primer. This prevents the MDF panel from absorbing too much moisture and improves paint adhesion.

5. After priming, you can do a light sanding with 320 grit. This smooths the surface nicely.

6. Apply the acrylic paint with a high-quality foam roller designed for furniture. I recommend several thin coats, allowing each to dry well (at least 6 hours).

7. For the number of pieces involved, 3 to 4 coats are a good amount.

8. Use a good fine-bristle brush for edges and corners.

9. Between coats, a light sanding with 320–400 grit helps if the paint feels a bit rough.

10. After the final coat, allow it to cure thoroughly – this can take several days depending on the paint.

One more tip: paint in a dust-free area at about 20 degrees Celsius (68°F) room temperature for the best results.

Are there specific parts of the shelf you’re concerned about, or would you like to know how to achieve decorative effects or a matte finish?

kibutar schrieb:
I’ll give you a detailed guide with some often overlooked details

Great tip about the primer and the sanding between coats!

I painted my Billy shelf a few months ago with acrylic paint and the result turned out really great—smooth, no drips, and the color has held up perfectly so far! 🙂

What helped me a lot was applying very thin layers and painting multiple times rather than one thick coat. This helps avoid drips and uneven surfaces. Also, when rolling, I always worked in even strokes and didn’t leave the paint open too long to prevent it from drying and becoming “grainy.”

A little motivation boost: This is a really nice DIY project, especially because you can personalize the shelf completely in the end. So keep at it and don’t get discouraged by the first attempt! :-)

I’d love to hear about your progress!