Metal
Arguably the most resilient material in this list, metal can require extensive preparation before it can be worked with for sculpting. Welding equipment is typically required for joining and cutting metal, meaning more specialist skills are required in order to sculpt using metal. The overall results can be incredibly striking, especially when such an industrial material is used to replicate such delicate forms.
Discarded metals can give sculpture artists a variety of forms to play around with, altering and joining them to other reclaimed materials to craft thought-provoking pieces of art.