About: http://webisa.webdatacommons.org/110579509

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	The oxidation is a dull gray or black and can be removed with polishing to make the aluminum shiny again.
http://www.w3.org/ns/prov#wasQuotedFrom	airliners.net