The materials that people usually use for their L shaped curtain rod is metal, however, you can also use iron or steel. It depends on the overall décor of the bathroom. Metal curtain rod that is finished with white color is good for more minimalist type of bathroom. To create a curtain rod, you can use suitable size of pipe and shape it L by using T pipe and pipe glue. This will definitely save money and also more efficient. If you afraid that it will ruin the concept of your bathroom, you can paint it or decorate it in such away that it can match with the overall concept of your bathroom. Architecture.