ᐅ Painting a Billy Bookcase After Assembly – Best Approach?

Created on: 10 Mar 2024 08:12
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traabiga42
Hello everyone, I am planning to repaint my already assembled Billy shelf to give it a more modern look. I want to achieve a smooth, durable finish that lasts a long time – not just a simple fresh coat, but one that is resistant to scratches and moisture. My question is: what are the best steps to follow for such a project? Specifically, I am interested in how to properly prepare the shelf (sanding, cleaning), whether I need to completely remove the original finish of the Billy shelf, and which type of paint is recommended (e.g., acrylic paint, polyurethane paint, spray paint). Also, do I need to apply a primer before painting, and if so, which one? Are there any experiences regarding painting directly on particleboard, or is a special intermediate layer necessary? I appreciate any detailed advice!
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Kinbu
10 Mar 2024 10:18
One more tip from my practical experience: If you use a foam roller for painting, you can avoid unwanted brush marks. When sanding, it is recommended to do an intermediate sanding with 320 grit between the coats of paint to achieve an even smoother surface.

Also: Always prime in well-ventilated rooms and strictly adhere to the drying times.
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kieran
10 Mar 2024 11:42
A brief addition: Treat the surface with a degreaser before sanding to prevent any oily or dusty residue from affecting adhesion. Although it may sound obvious, this step is often overlooked.

For two-component polyurethane (2K PU) coatings, be sure to follow the mixing ratios precisely; otherwise, the film will not cure properly.
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Greglau
10 Mar 2024 14:19
For a cheaper solution: sanding, primer, then chalkboard or blackboard paint as the final layer. Not as durable, but quick.
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lubla
10 Mar 2024 16:07
Twist: If you only want to give the typical Billy look a matte finish, spray paint is actually okay. Just sand it thoroughly and use an adhesion primer. More suitable for decorative shelves.
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traabiga42
11 Mar 2024 07:34
Thank you for the many helpful answers!

I have another question regarding primer: Is there a common product or specific brand that is especially recommended for melamine and particle boards? And how long should you ideally wait after priming before applying the paint?

Also, how important is room temperature during painting? I want to ensure an optimal drying process with as few problems as possible.

If anyone has good advice on tools (brush vs. roller vs. spray), please feel free to share.
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PeoDaniel
11 Mar 2024 08:05
traabiga42 schrieb:
How important is room temperature when painting?

Very important; the ideal temperature is around 18-22 degrees Celsius (64-72 degrees Fahrenheit). Cooler temperatures significantly extend drying times and can affect the paint film formation.
traabiga42 schrieb:
Is there a common product or a specific brand for primer?

For melamine, I recommend adhesion primers from brands like "Clou," "Borma Wachs," or "Hammerite Plastic Adhesion Promoter." These are specially formulated for smooth plastic surfaces. It is very important that they are compatible with the subsequent paint layer.
traabiga42 schrieb:
Tools?

For large surfaces, a foam roller is ideal as it provides a smooth, even finish. Brushes are only suitable for edges or smaller areas. Spray paint often results in uneven coverage if you are inexperienced.