From Stair Banister Refinishing · Step 3 of 5 · Video by This Old House

Showing 3:11–4:18 of the source video.
It's time to apply the primer. Use an oil-based primer, as it provides better adhesion for the type of wood typically found on stairs and withstands high foot traffic. Start by applying primer to the handrails from top to bottom using a paintbrush. Once the handrails are done, proceed to the stair treads, applying the primer lightly. The oil-based primer used here dries quickly, within about 1 hour, allowing for relatively fast turnaround to the next painting stage.
Goal: Apply a coat of oil-based primer to handrails and stair treads to ensure better paint adhesion.
This DIY project provides detailed instructions on how to properly prepare and paint stair treads and handrails. It covers the importance of sanding for adhesion, applying an oil-based primer, and finishing with durable paint for high-traffic areas, resulting in a refreshed and protected staircase.
If you are painting the banister, apply one or two thin, even coats of a bonding primer specifically designed for slick surfaces. Use a high-quality synthetic bristle brush for smooth application. Allow each coat to dry according to the manufacturer's instructions before applying the next coat or proceeding to paint.
This project outlines how to paint or gel stain a stair banister without complete removal of the existing finish. It involves cleaning, light sanding, applying a bonding primer (if painting), then applying paint or gel stain, and finally, a protective topcoat. The process aims to refresh the banister's appearance while minimizing labor-intensive stripping.
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