I want to know if there is a scientific way for skeleton monster to keep their hardness intact or strengthening it without getting wear or weakened from the elements. since they have no guts or internal and external organs in general except bone, so they cant digest or eat to gain materials or minerals needed. spilling milk over their bone actually wont work from what i found out recently, infact the milk can make it worse (but correct me if i am wrong), and i am not sure trying to bath themselves with sunlight can give them vitamin D with only their bone left intact, beside i see some bone left outside getting so dried up and create a crack on their bone. if its actually a possible method, how long does the skeleton need to bath on sunlight or the temperature that is safe or dangerous for them to take sunlight bath?
and i dont mean dipping them or lacquering themselves with metals, even with that, i believe it still will give crack or shatter the original bones inside, due to the internal force if getting hit or due to the heat difference. or putting armor in general including softer/non-rigid armors, if its not clear enough.
also answer like they should stay inside forever to keep their bone structure from wearing due to the elements or something similar, is out of the questions because thats not my main question or my concern.
also changing the bone to be made of metal or something else is out of the questions, this is mainly regarding the usual bone composition or component like calcium or magnesium. and i want to know in a natural way rather than artificial made up high tech tools such as nanomachine, i know its too late since someone quickly answer using that but so be it.
i hope this is at least understandable enough....., and feel free to correct my grammar and tag to be appropriate, because i dont even know what tag is appropriate for this.
ps: i am not sure are mythical-creatures tag is correct for this....after all....Skeleton is real.....they are living inside YOU!