How can you fix your marvel legends action figures waist joints?

To fix the waist joints of Marvel Legends Action Figures, first, assess if the joint is loose or stiff. For loose joints, you can apply a small amount of clear nail polish or super glue to the joint and allow it to dry to create friction. If the joint is too stiff, carefully disassemble the figure and apply a tiny amount of silicone lubricant to ease the movement. Always proceed with caution to avoid damaging the figure.