|Barcelona chair designed in 1929.|
1). For rust, try using naval jelly. Wearing gloves in a well-ventilated area, apply the jelly using a wire brush working the pits and heavy rusted areas. After 5 - 10 minutes the naval jelly will dissolve the rust. Wipe clean to reveal like-new metal.
2). To clean the upholstery, start by wiping it down with a dry cloth, then vacuum the surface to remove all debris. Next, wet a cotton rag with warm water and a mild soap (like Ivory soap), blot the upholstery being sure not to wipe too hard or to soak the leather - this can damage the upholstery. Once dry, apply a leather conditioner. To keep your leather looking its best, keep it out of the sunlight, condition it often, and keep it in a room with about 50% humidity.
3). For worn straps, our friends at the Regency Shop have the solution with their how-to videos on removing and replacing the worn straps on a Barcelona chair.