2001 Protege body rust and horn issue

I am looking to patch up the rusted rocker panels and rear wheel arches on my 2001 Protege LX 2.0. Would the widely available patch panels and sections be good enough for it?

For example:

http://rover.ebay.com/rover/1/706-5...2&toolid=10001&campid=&icep_item=271525726104

http://www.topbananaparts.com/passenger-side-rear-wheel-arch-32.html

I also noticed my horn has started making a low (almost) screeching noise when it was much louder a few months ago. I suspect it may be rusted, but not entirely sure where it is located or how difficult it is to replace. Any advice?
 

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  • front wheel passenger side.webp
    front wheel passenger side.webp
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  • front wheel driver side.webp
    front wheel driver side.webp
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  • rear wheel driver side.webp
    rear wheel driver side.webp
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  • rear wheel passenger side.webp
    rear wheel passenger side.webp
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Last edited:
I have attached pics of the wheels on my first reply. Now for the rocker panels.
 

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  • rocker panel passenger side.webp
    rocker panel passenger side.webp
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  • rocker panel driver side.webp
    rocker panel driver side.webp
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