Painting an old garden bench will improve its appearance and preserve its materials. common materials used to make garden benches include wood, metal and plastic. special paints have been formulated to paint each of these materials. paint an old garden bench by preparing the bench and then priming and painting it with a finish coat.. Find great deals on ebay for garden bench paint and wood paint. shop with confidence.. 1-16 of 379 results for "garden bench paint" cuprinol 750ml garden furniture stain teak. by cuprinol.