Yes, leather and enthnographic conservators did once encourage applications of Br. Museum Leather wax. I carefully followed their advice. I believe they now suggest a do nothing approach. Keep the artifacts dusted, clean. Keep them stored with specifically designed supports. Others on this board can respond to this approach — is it correct? Make polyester batting “pillows” secured in unbuffered, acid-free tissue. The tissue will prevent the polyester from catching on tears and rough spots. Put the pillows inside the bags to support the shape and ensure the shape doesn’t collapse.