Sanding: Your guide to a perfect finish
Removing, smoothing, preparing, and perfecting: sanding is one of the most versatile DIY jobs. What do you need to get a smooth result and what's the best way to do it? Here are our top tips for the perfect finish.
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AIAIAIWhat is sanding?
Sanding is what's known as an abrasive machining process, where material is removed from a surface in tiny particles. As this process creates very fine dust, you should always wear a dust mask! Sanding has three main purposes:
- Smoothing surfaces
- Sharpening tools
- Cutting materials
Depending on the job, you will need a sander, grinding discs, sharpening stones or sandpaper.
Which sander for which job?
Whether you're sanding parquet flooring or stripping old paint from the garden gate, sanding is all about the perfect combination of sander, abrasive and technique. In theory, any sander can do any sanding job, but you should always use the best tool for the task. Here's our overview:
- Belt sander: Large surfaces with high material removal
- Detail sander: Edges, corners and awkward areas
- Random orbit sander: Fine finishing and polishing of flat or curved surfaces
- Orbital sander: Coarse work on large surfaces
- Angle grinder: For grinding and cutting
- Drywall sander: Smoothing walls and ceilings
- Hand sander: The finest work and intricate corners
How do I sand correctly?
Every sander can be used in several ways. With the right sanding technique, you'll ensure optimal material removal while minimising the risk of damaging your workpiece.
Dry sanding
Dry sanding is done without water, oil or emulsions as lubricants and coolants. This allows you to remove a lot of material quickly. This makes dry sanding ideal for coarse work.
Wet sanding
With wet sanding, a liquid serves as a lubricant and also cools the workpiece during processing. This allows you to sand at a high speed. Wet sanding is particularly suitable for filled, painted car bodies. Wood for bathroom furniture or other wet areas is also moistened during the sanding process.
Hand sanding
A non-slip hand sanding block made of cork or hard rubber, as well as soft, fleece-based abrasives, allow for precise and effective work. Hand sanders are a good choice for complex structures and hard-to-reach areas. For example, you can use them to remove old paint from window frames.
Belt sanding
Electric belt sanders work with a sanding belt that is guided and driven over motorised rollers. They sand large surfaces particularly quickly. This makes belt sanders ideal for coarse and preliminary sanding, as well as for removing paint from doors or gates.
Our tip: The right abrasive will turn your sander into the perfect tool.
Sanding wood in 4 steps
Got your tools? Let's get sanding! Our step-by-step guide for wood can also be applied to other materials. If you're not sure, check out our tutorials!
Step 1: Coarse sanding
Secure the workpiece on the workbench or place it on a stable surface. Take a coarse-grit sandpaper (P40 to P80) and work along the grain of the wood. Make sure your movements are even and apply light pressure. Don't let the sander rest in one spot for too long.
Step 2: Dampen the wood
Evenly dampen the wood with a sponge. This will cause the wood fibres to stand up, making them easier to sand down. Let the wood dry a little.
Step 3: Medium sanding
Switch to a medium-grit sandpaper (P120 to P180). Work evenly with light pressure across the grain. Remove the wood dust and dampen the workpiece again.
Step 4: Fine sanding
For the final finish, a fine sandpaper with a grit of P180 to P400 is ideal. Use this to work along the grain until all unevenness has disappeared.
Top tip: Always keep some sandpaper in your toolbox. You can use it to quickly and easily remove things like glue residue or layers of paint.
