Being an extraordinarily nice axe, its original creator must surely have taken proper care of it and kept it clean, but over the years it clearly accumulated some dirt and a few modifications. Not wanting to damage an important historic artifact, the finder decides to leave the patina alone and donates the axe as found.
The museum requires the donor to add an exhibit label. Unfortunately, the finder being Belgian and speaking only French, there is a severe misunderstanding about the purpose of the axe.
On the day the exhibit is first shown to the public, hell breaks loose. People threaten to sue because the dirty prehistoric axe is against all regulations that apply to contemporary axes. Some attempts are made to remove the dirt, but only in a way that preserves the dirt, which enrages the other camp even more.
Ultimately, the exhibit is withdrawn from the museum, but luckily many had a chance to make copies and 3D copies that they keep safely in their private collections.