How to reseal wooden stairs?

ASR

Hi Team,
I have wooden stairs that were stained and sealed about 14 years ago. Over time, they’ve started to show signs of wear, including scratches and scuff marks. I'm planning to reseal them and wanted to ask for your advice.

Do I need to completely sand off the old coating before resealing (which is quite a big job), or can I simply buff the surface lightly with sandpaper and apply the new sealer over that?

Thanks in advance for your guidance.

Thanks in advance for your guidance.

MitchellMc

Welcome to the Bunnings Workshop community @ASR. It's splendid to have you join us, and many thanks for your question about restoring a staircase.

When resealing wooden stairs that were stained, the best approach depends on the extent of the wear and how deep the scratches are. If the scratches and scuff marks are only superficial and haven’t penetrated through the stained layer into the timber, you can lightly sand the surface with fine-grit sandpaper (around 180–220 grit) to dull the existing sealer and help the new coat adhere properly. After sanding, make sure to thoroughly clean away all dust before applying the new sealer.

However, if the scratches have gone through the stain and exposed bare timber, simply sealing over them won’t restore a consistent finish. The exposed wood will absorb the new sealer differently, making the scratches stand out rather than blend in. In this situation, you have two options. One is to touch up the scratched areas with a matching stain before resealing the entire staircase. This can work for minor damage, though blending old and new stain perfectly can be a bit tricky. The other—and more effective—option is to sand the entire staircase back to bare timber. This allows you to apply a fresh, even coat of stain followed by a new sealer, giving you a consistent and long-lasting result.

It might sound like a big job, but take it one step at a time—literally! You're already on the right track by planning ahead and asking questions. With some preparation and patience, you'll have your stairs looking fantastic again. Don’t hesitate to reach out if you need help choosing products or tools along the way—you're definitely not alone on this project.

Please let me know if you have any questions.

Mitchell