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Dipping them in a bit of warm/hot water can open up the pores ... wipe them with a paper toul and let them sit in mineral oil for a few hours i'm sure that will get the oil in...but balistol ...i...

Ivory is very dense bone like material...it is usualy very resistant and flexible even in thin scales...but...it all depends on the condition the ivory is in.

If it has cracks around the pin...