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Repainting stairs that were previously varnished

Postby Issy0412 » Sun Aug 23, 2020 11:28 am

I have a domestic set of wooden stairs, open (no risers) in 1970s style. Their most recent coating was 10 years ago when they were coated with blackfriars polyurethane coloured varnish (dark mahogany). This has lasted well with no chips on the treads. I would now like to change the colour and maybe the finish to black or very dark treads and white rails and sides. I am looking to use paint, with non slip floor paint for the treads. I would be happy with any coat for the treads as long as it was black or very dark in colour. Can you advise how to prepare and follow through with this job. I have some Zinnersen BIN primer. Do I need to strip everything (and the treads in particular) to the wood (which may contain stain from early times) to remove the polyurethane etc or can I simply rub down and coat the primer everywhere as a suitable base for the floor paint and ordinary gloss/satin for the sides? Any help or recommendations would be greatly appreciated. many thanks.
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