Once you’ve picked your boards, before applying any sort of finish, sanding pine wood is the first step.

A good, throrough sanding job is the foundation to a flawless, beautiful finish.

If you’re like me and you get a real sense of pride in an expertly finished piece of pine, then this first step will set you up for success and a job you can be proud of.

Sanding pine using sponges

For trim boards, I like using dual-angled sanding sponges. The angled sponges are great for sanding the contours and crevices of molding.

For flat pine boards, I’d use a sanding block. You can either get a sanding block at your local home center or just wrap a piece of sandpaper around a palm-sized block of wood.

But for sanding pine wood molding, start with a medium grit sanding sponge and give the board a good sanding — with the grain of course. Going across the grain will introduce scratches and if you don’t get those out they definitely be noticeable after you’re done applying stain. Noticeable to the point where you’ll be using the board to test miters.

Whatever you do, don’t take a power sander to pine. You might not see the tiny swirl marks after you’ve finished, but they’ll show up as soon as you apply the stain.

The sponge is great for hitting the contours of the trim. The medium grit sponge corresponds to about 100-grit sandpaper. (Grit refers to the number of abrasive particles per square inch.)

If you really need to get into a crevice or crease, I’ll take some regular sandpaper and fold it over a couple of times to give me a stiff edge. I’ll sand using the folded edge.

You could also pick up contour sanding sponges. These make it even easier to sand curvy trim molding and get into nooks. These are essentially thin (3/16” thick) sanding sponges that are much easier to shape around what you’re sanding.

For flat boards or for the larger flat section of baseboard trim, I’ll use a sanding block. The sanding block is best for uniform pressure on flat surfaces.

You should be generating a decent amount of sawdust at this point. Once you’re done sanding with the medium grit, you can switch over to the fine grit sponge.

Sand the trim board with the fine sponge until you’ve got a nice, smooth surface. (Fine grit sponges are equivalent to about a 180-grit sandpaper.) Again, make sure to get into all the nooks and crannies. The piece should feel noticeably more smooth (think “smooth as glass”) than it did after sanding with the medium grit.

Sanding pine helps control the blotches

If you’ve stained pine before, you’ve probably cursed loudly at the blotchy finish you got if you didn’t use a pre-stain wood conditioner. A good sanding with a fine grit sponge or sandpaper help to reduce some of that blotchy appearance as sanding with a fine grit helps to close off some of those wood pores that absorb more stain.

In my experience, though, I still need to apply a pre-stain conditioner. In comparison between conditioned wood and bare wood, I found that the color tends to be just slightly lighter on the conditioned wood. I’m always able to to darken it up with a second coat of stain after the piece had dried overnight.

I use Minwax’s Pre-Stain Wood Conditioner with great results using dark stains. I get the best results when I apply the stain within 15 minutes of applying the wood conditioner.

Now that you’re done sanding and prepping, move on to the next step — how to apply stain.

I hope you found this guide on sanding pine wood useful. I focused on sanding pine because that’s what most people use for trim molding. However, this guide would apply to any type of softwood.

Image 1 via Creative Commons Attribution.

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