About: http://webisa.webdatacommons.org/16983696

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In your case, the most likely cause is something on the electro-coated finish that is difficult to remove by any normal cleaning method.
http://www.w3.org/ns/prov#wasQuotedFrom	pfonline.com