When it comes to finishing wood, knowing how to sand wood is an essential part of the process! Having a smooth, sanded wood surface makes all the difference for a beautiful, wood finish or painted finish on your project.
In my how to stain wood tutorial, I provided an overview of how to sand wood before staining it, but I want to go into more detail on the step by step process, sanding tools, why it’s important, and share my favorite tips too!
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Why Wood Needs to Be Sanded
You may be wondering, do you really need to sand wood before staining or do you have to sand before painting? Based on my experience, I say yes to both of these questions and that it is even more important with staining wood. As I noted in my how to stain wood post, I really dislike sanding, it’s not fun, but it’s a foundational step in the wood finishing process.
Most raw wood comes in a rough condition (unless it’s purchased pre-sanded) from the home improvement store or lumber yard. It feels rough and a bit saw dusty, with marks, dents, and other blemishes on the surface.
Therefore, if you were to stain over that, it’s going to be a messy, blotchy finish and the true grain of the wood is not going to show through as beautiful as it would if you sanded it first. Also, with staining, when you sand the wood, it opens up the pores of the wood for the stain to really absorb well and evenly.
And if you were to paint over a non sanded wood surface, there is going to be a lot of texture that shows through and again it’s not going to look as well or like a smooth finish. The same concept applies to old wood or wood that has an existing finish on it too!
Below is a photo of two pieces of wood that were cut from the same piece of lumber and stained the same color. One piece of wood has been sanded and the other piece has not. It’s a dramatic difference and shows the importance of sanding wood!
When You May Not Need to Sand Wood
There are times when you can get away without sanding or just do very little sanding. For example, with painting, if a wood surface has already been painted or stained and is smooth and clean, you could paint over it without sanding. Especially, if you are using a primer first and a top coat or sealant wasn’t used.
Or if you are buying a premium piece of wood that is in really good condition, you can sometimes get away with doing less sanding and just use one or two higher grit sandpapers, rather than 3 different grits (explained in step #2 below). It’s really a judgement call based on the condition of the wood and how you prefer the finish to look!
Types of Sanders
There are many different types of sanders and sanding tools available for sanding wood. Below I briefly go over some of the main types and my favorites.
Orbital Palm Sander
I highly recommend an orbital palm sander for most wood projects, which is a very efficient and affordable sanding tool. If you can only afford one sanding power tool, this is usually the best to buy. Most have coordinating sanding discs that easily stick on and peel off the sander too. I use this sander for the majority of my woodworking and home improvement projects.
I love my small, corner sander which works well for getting in the small corners that an orbital sander can’t reach. It’s really quick and easy to grab for smaller sanding projects too.
Sanding Block or Sandpaper
For light sanding, you can hand sand with just a piece of sanding paper (they come in sheets), or sandpaper wrapped around a small piece of wood, or a sanding block. This is essential to always keep on hand!
If your wood needs a lot of heavy duty sanding, a belt sander may be a good tool to start with and they are often available for rent or purchase at home improvement stores.
Dremel Tool with Sanding Attachment
The Dremel Rotary tool with a sanding attachment (there are different sizes and shapes available) is handy for tiny corners, crevices, and edges that other sanding tools can’t reach. It’s definitely not a necessity, but a handy, extra tool. We used it to sand an old finish off of the small, turned table legs on our side table makeover and it worked great!
How to Sand Wood and Sandpaper Grits
1. Set Up a Work Space and Wear Sanding Dust Protection
Sanding wood is a messy process (lots of sawdust) and it’s best to do outdoors or in a workshop/garage if possible. Try to use a secure, flat surface or work table. I like to set up a pair of sawhorses and a plywood board from the home improvement store in my backyard.
Note, you can buy shop vac attachments for your orbital palm sander or belt sander to help eliminate even more of the saw dust that isn’t caught by the attached bag on the sander.
Make sure to wear safety goggles to avoid getting sawdust in your eyes. You can wear a face mask or sanding face respirator too if you want. Also, I like to wear some utility work gloves when sanding to avoid splinters and to help reduce sanding vibration on my hands.
2. Pick your different Sandpaper grits
Sandpaper ranges in different grits from very coarse sandpaper, like 60 grit, to very fine grit sandpaper, like 220 grit or 320 grit. It’s best to start with a low grit sand paper to sand your whole project. This usually takes the longest amount of time as it really gets all the rough stuff off of the wood. As you move up in the grit number of sand paper, the smoother the finish will be on your project piece, and the less material is removed.
Determine which grits you will need for your project. I typically use 80, 120, and 220 grit sandpaper.
Note, if I am using a premium wood for my project that is in really good condition to begin with, then I will typically just first use 120 and then 220 grit only. But, if my wood is really rough to begin with or has a lot of an old finish on it, I will start with 60 grit sandpaper and move up in the grit number from there.
3. Start with a coarse grit sandpaper
Start with a rough grit sandpaper, such as 80 grit. As noted above, this first round of sanding, with the coarsest grit, will take the longest and remove the most amount of material. There will be a noticeable difference in the look of the wood as you sand. It’s one of my favorite steps as the true color and grain of the wood is revealed as all of the blemishes are removed.
Here is a photo showing half of the wood sanded with just 80 grit sandpaper:
4. Use a medium grit sandpaper
Next, use a medium grit sandpaper, such a 120 grit or 150 grit, to start to smooth the surface of the wood.
5. Finish sanding with a fine grit sandpaper
Finally, finish sanding with a finer grit sandpaper, such as 220 grit. Ultimately, you want to make sure the wood surface feels smooth to the touch once complete. Below is a photo showing our wood fully sanded with 80, 120, and 220 grit sandpaper compared to a photo of the wood before it was sanded.
6. Remove Sawdust from Wood
Lastly, you need to remove the sawdust from the wood. There are many ways to remove the sawdust, like using a shop vac, a damp cloth, etc.
My favorite way to remove the sawdust is to use a soft bristled brush to sweep off the bulk of the sawdust. Then, I wipe down the wood with tack cloth to remove the remaining saw dust. Tack cloth is sticky so I like to wear latex gloves when cutting and handling it, but it works great for removing any remaining saw dust and you don’t need to use a lot of it.
One last tip I want to share about sanding is that I think it’s best to do the bulk of your sanding before cutting or ripping wood to size for a project. It’s much easier to sand larger pieces of wood than small pieces. Then, you can just hand sand (or use another sanding tool) quickly anywhere you need to once your project is complete!
Alright, that’s it for how to sand wood! Now that your wood surface is all sanded and smooth, it’s ready to go for your stain, paint, or other finish application! If you need more information on staining wood, check out my tutorial on how to stain wood!
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