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A Google search brought up this page:

https://www.google.com/search?q=How+to+unwarp+a+phonograph+record&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=fflb

From 30+ years ago, I remember being able to make bowls from badly scratched LPs...

http://www.instructables.com/id/How-to-Make-Vinyl-Record-Bowl/

Please let us know the results. Good luck!
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