REMINDER: The 302 SS formulation used in our pins is pliable enough to bend with hand tools, and being solid, has no plating to flake off. However, like most metals, stainless steel becomes 'work hardened' if bent more than once or twice in the same place. This makes the metal brittle and if bent further, it may break.
TIP: For a lighter padding or barrier between art and pin, we use 2 or 3 coats of Krylon 1301 Clear Acrylic Spray. Stick those that need spraying in a block of Ethafoam for easy handling. Use very thin coats. They dry faster and don't leave blobs of spray.