corrosion problem

How do I restore this:
http://orange.users.sbb.co.yu/Amiga/rust/P8040004.JPG
http://orange.users.sbb.co.yu/Amiga/rust/P8040006.JPG
http://orange.users.sbb.co.yu/Amiga/rust/P8040007.JPG
http://orange.users.sbb.co.yu/Amiga/rust/P8040009.JPG
http://orange.users.sbb.co.yu/Amiga/rust/P8040011.JPG
?
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Throw away and buy new?
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