As a wallpaper designer I think you know what I'm going to say...Wallpaper, of course! My latest designs (The Joinery Collection) can be mixed and matched on the wall for unique outcomes. This mirrored effect is just one way to go. Check out my bespoke design service too. I can incorporate branding, lettering and photography. www.identitypapers.com

Depends on the mechanism but if the door doesn’t get scratched or scraped then there’s no reason why wallpaper should either. A problem worth mentioning tho is that the edges of the wallpaper would remain visible. Photo below shows a screen I bodged together from some old wardrobe doors and I wallpapered them both sides, notice the white edges of the paper. Only way I can think of overcoming this is to have the wallpaper slightly inset and paint a border round the edge. I would also use decorators varnish on top of the wallpaper to protect from dirt and and the odd scuff or two. A vinyl decal (wall/door sticker) would definitely work tho, and far easier to apply.

Strip the wallpaper and apply mould killer to any mould under the wallpaper before painting. You don't need a professional. Most decorating jobs can be tackled by a diy-er.

'kate stated a good point' it is important to be aware of the potential for toxins in the walls and paper of an old house. Some of the toxins that may be present in old wallpaper and paint include: Lead: Lead was commonly used in paints and wallpapers until the 1970s. Lead poisoning can cause a variety of health problems, including learning disabilities, behavior problems, and neurological damage. Arsenic: Arsenic was also used in paints and wallpapers until the early 1900s. Arsenic poisoning can cause a variety of health problems, including skin problems, nausea, vomiting, and diarrhea. Mercury: Mercury was used in some types of wallpaper until the 1950s. Mercury poisoning can cause a variety of health problems, including kidney damage, neurological damage, and birth defects. If you are concerned about the potential for toxins in the walls and paper of your old house, you should have the walls tested by a qualified professional. If toxins are present, you will need to take steps to remove them safely. Here are some tips for safely removing toxins from old wallpaper and paint: Wear gloves, a mask, and goggles when working with old wallpaper and paint. Dispose of the old wallpaper and paint in a sealed container. Vacuum the area thoroughly after removing the old wallpaper and paint. Wash the walls with a mild soap and water solution. Apply a coat of primer to the walls before painting. By following these tips, you can help to protect yourself and your family from the harmful effects of toxins in old wallpaper and paint. In addition to the toxins mentioned above, there are a few other things to be aware of when working with old wallpaper and paint. Some older wallpapers may contain asbestos, which is a known carcinogen. If you are unsure whether or not your wallpaper contains asbestos, it is best to have it tested by a qualified professional. Old paint may also contain lead. If you are planning to sand the walls before painting, it is important to take precautions to prevent the lead dust from becoming airborne. You can do this by using a wet sanding technique and wearing a respirator. It is always a good idea to consult with a professional before working with old wallpaper and paint. They can help you to assess the risks and develop a safe plan for removal. https://attentiondetail.co.uk/decorating-advice-%26-tips