Scrapers (as opposed to scraper bikes) are cars, generally American-made, but in Oakland often Lexus-es, customized with any number or combination of the following: fancy, usually oversize rims, tinted windows, bright/sparkly paint and/or beats. Rapper E-40 has a song with the lyrics "sittin' in my scraper watching Oakland gone wild."
Examples of Scrapers Seen in Oakland:
photo CC BY-ND 2.0 by Nick.Fisher .JPG/_info/)
seen on 23rd Avenue in May, 2013 by greenkozi (features bright paint job, dark tint and fancy rims) 
Ivy Hill/Bella Vista, July 2011
photo from Our Oakland 
Laurel, MacArthur Blvd., November 2012
photo from Our Oakland
classic example of Lexus with logo and bright paint. photo CC BY-NC 2.0 by vision63.jpg/_info/)
matching rims and metallic paint on Cadillac Seville photo CC BY-NC 2.0 by vision63
big rims on old GM. photo CC BY 2.0 by Raido Kaldma
Claremont Ave, March 2014
CC SA-BY Our Oakland
photo CC BY-ND 2.0 by Nick.Fisher
busted stang, near Piedmont Ave.
CC SA-BY Our Oakland
