How do I strip a painted staircase?

This job is frequently started with enthusiasm and abandoned halfway, leaving a staircase in worse condition than before. Two questions answered at the start prevent that: is the paint safe to disturb, and is what is underneath actually worth having. Neither is difficult to answer, and both change the plan completely.

Safety

Step by step

1. Test for lead before disturbing any paint.Home test kits exist and are cheap. Anything decorated before 1992 may contain lead, and pre-1970 paint very likely does. This determines the method, so it is genuinely the first step.
2. Find out what timber is under the paint.Strip a small hidden area first. Many staircases mix species — a decent hardwood handrail with softwood treads and plywood risers — because they were always intended to be painted. Exposing that is often disappointing.
3. Decide what you are actually stripping.Stripping the handrail and balustrade back to timber while painting treads and risers is a common and much smaller compromise, and often looks better than a fully stripped stair.
4. Choose the method to suit the surface.Chemical strippers cope with mouldings, spindles and carved detail where abrasives cannot reach. Sanding suits flat treads. Most staircases need both.
5. Control the dust regardless of method.Sanding a staircase distributes dust through the whole house because the stairwell is a chimney. Seal doorways, use extraction, and keep the area ventilated.
6. Work in sections and keep the stairs usable.This job takes days. Plan it so there is always a safe way up and down, and never leave loose strippers, sheeting or tools on a flight.
7. Neutralise and clean thoroughly after chemical stripping.Residues left in the grain prevent any new finish from curing. Follow the product's instructions on neutralising rather than assuming a wipe is enough.
8. Fill, sand and seal before the finish coat.Stripped timber is rarely ready to finish. Expect filling, and expect to raise and cut back the grain before a clear finish looks acceptable.
9. Reconsider at the halfway point without embarrassment.If the timber underneath is poor, painting it again is a legitimate outcome rather than a failure. Knowing that in advance makes it an easier decision.

Alternatives

• Repaint properly instead: Sound existing paint, prepared and recoated with a good floor-grade product on the treads, gives an excellent result for a fraction of the effort and none of the lead risk.
• Strip the handrail only: The part most often made of decent hardwood, the part most touched, and a fraction of the surface area.

Questions people ask