Tools and Materials

Tools

Materials

Primer
High-quality latex
Wood filler
Dust mask (for safety)

4 Steps on How to Paint MDF

One of the most important things you should never skip when you’re learning how to paint MDF furniture is the preparation process. Unlike wood, MDF has no natural grain, giving it a smoother surface that can absorb moisture from paints and primers, especially at the edges. For a smooth finish, start with a light sanding.
Begin by sanding the entire surface with 120-grit sandpaper. This is especially important because sanding the surface smoothens it, so primer and paint look better. After sanding, always use a tack cloth to wipe off the dust. For edges that may seem rough or frayed, a layer of wood filler can help. Spread the filler along the edges, let it dry, then sand it down for a uniform surface.

MDF's properties include that it absorbs paint very well if not properly primed, resulting in blotchy surfaces. To prevent the material from absorbing too much paint, an oil-based or shellac-based primer is ideal.
Pour your paint into a tray and use a clean foam roller for smooth, even coverage. Foam rollers are used because they impart the least amount of texture compared to roller or brush. Give a thin layer of uniform coloration to every part of the object.
Ensure the edges are covered well since they remain the most absorbent part. Allow the primer unit to dry for 24 hours. If the surface becomes dry, sanding it using 220-grit sandpaper.

Tip

It is preferred to apply two layers of primer on the edges because these are the most absorbent and likely to chip.

Latex-based or oil-based paints should be used on MDF surfaces. Latex-based paint is used for interior furniture mainly because it dries quickly and has low emissions of Volatile Organic Compounds. Nonetheless, oil-based paint has a better standard for surfaces likely to be exposed to heavy use. Instructions on how to paint MDF furniture may vary depending on the type of paint you are using since each offers varying gloss and durability.
Once you prime and sand your surface, it’s time to paint. Oil-based and exterior paint requires a few adjustments, but you can still paint using a foam roller and a tray. Paint the surface with a very thin layer, followed by drying. Numerous thin layers are usually better than one thick layer because they achieve better coverage and avoid warping in the MDF.
You may use an angular brush to access semi-recessed areas at narrow angles or confines. The product typically requires a second application to give it the much-needed sheen. When the first coat is set, lightly rub the wall using 220-grit sandpaper and clean with a tack cloth. Then, do the same thing and apply the second coat on top of the first one.
It is recommended that each coat layer be allowed to dry before applying another layer. For the best outcome, the final coat should dry for 24-48 hours.

Tip

Apply sandpaper between all painted and sealed layers to create a smooth surface. Sanding flattens the surface, removing small raised bits and providing a smooth surface for the next layer to paint.

Solving Common Problems while Painting MDF

Blotchy Finish: If your finish is blotchy, you have likely under-primed the MDF or it could be that some places have absorbed paint better than others. More coats of primer applied and light sanding can always help with this.
Warping: It is also important to realize that MDF can warp when paint or moisture is applied in certain areas. To prevent this, use minimal quantities at a time, allowing the first one to dry before proceeding with the other.
Visible Brush Marks: If you find brush marks when painting, switch to the foam roller. Lightly sanding between coats is another way to reduce texture.

Painting MDF can be a little tricky, but if done properly, it will yield a professional look and feel. From learning how to paint MDF to using the right product type and approaches, this guide will ensure that your end product is visually good-looking and long-lasting. With that being said, you are now ready to paint your MDF furniture and other surfaces made of MDF.

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A Guide On How to Paint MDF To Get The Perfect Finish