Older turtles typically display an abraded or worn carapace. The body is scaleless and the skin is covered with easily abraded, silvery guanine. Avoid exposing abraded skin to the sun as permanent hyperpigmentation can develop. Their scales are silvery, delicate and easily abraded. Precious metal may also be easily abraded and worn away through use. The painting has lost much of its original framing, and its surface is badly abraded. The floor is abraded with 180 grit screen on the buffer. The skin is extremely soft and easily abraded during collection or even by simple handling. For these reasons, it is easily abraded or torn by even minimal physical force. Feathers are dead structures at maturity which are gradually abraded and need to be replaced. Parts are abraded and some parts have been slightly altered. Over time, they become worn and abraded, and need to be replaced. The "bokor" (sorcerer) would have given Narcisse a powder containing the tetrodotoxin through abraded skin. Letters on the verso survive clearly, but those on the recto are seriously abraded. Feathers become abraded over time and all birds need to replace them at intervals.