How can I get these scratches out? The tires are still smooth when you run your finger over them, so I guess its just the clear coat that is scratched. Any suggestions? Thanks

 

Treat it like you would if there were scratches in your paint. Depending on how deep the scratches are.
Deep=wet sanding with very fine wet sand paper, then perform Shallow.
Shallow=rubbing and polishing.
Just a little work will take the scratches right out.
If it is REALLY deep, Sand it to metal, clean it good, and re-clear coat and polish.

Hope that helps.
Paul