Seeing rust on your new garden bench hardware is frustrating, but it's highly preventable. The key is creating a barrier between the metal and moisture. Start by choosing the right materials from the outset. Stainless steel (especially grades 304 or 316) and hot-dipped galvanized steel bolts are your best bets for inherent rust resistance.
If your bench came with untreated hardware, don't worry. You can add protection yourself. Thoroughly clean all bolts and metal parts with a degreaser and let them dry completely. Then, apply a dedicated rust-inhibiting primer. Follow this with a topcoat of outdoor-rated enamel paint or a clear protective spray designed for metal. For added defense, consider using a silicone or Teflon-based sealant on the threads during assembly to block water seepage.
Regular maintenance is your final shield. Every few months, wipe down the hardware with a dry cloth. Once or twice a year, inspect the bolts and touch up any scratches or chips in the coating immediately. Consider applying a thin layer of car wax or a specialized metal protectant paste for an extra hydrophobic barrier. Avoid using harsh chemicals or abrasive pads during cleaning, as they can damage protective coatings. By selecting quality materials, applying a robust finish, and performing simple checks, you can ensure your garden bench remains sturdy and rust-free through many seasons of enjoyment.