Plated metals are fairly durable but tend to peel if not done well. Plating wears off at points of constant use after a period of time. Aluminum also can be coated with a transparent plating to protect it. This finishing process, called anodizing can be done using colors, for instance, brass, bronze, gold and some dark, opaque colors. Glass may be clear, colored, etched, obscure, textured or smoked.
Stone can be natural or polished, rough or smooth.
Edges should be rounded or beveled and polished. Rattan is naturally silicon-coated, so it generally doesn't need any additional finish. Rough spots or discolored areas may require some sanding. If so, use a finish to seal the sanded areas. You may use clear lacquer, varnish or enamel.