Step 5 · Step 5: The Finishing Touches: Fill and Sand

Attention to detail is what separates a DIY project from a professional one. Using a putty knife, press wood filler firmly into all nail holes, screw holes, and any small gaps on your treads, risers, and skirting. Follow the manufacturer's instructions and allow the filler to dry completely. Once dry, give all surfaces a final, light sanding with a fine-grit sandpaper (150-grit to 220-grit) to create a perfectly smooth canvas. Wipe everything down with a tack cloth to remove all dust, ensuring a pristine surface for staining.