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Fret rubbers look pretty simple to use. Crimson guitars do a set of you want to save yourself some import tax from stewmac.
https://www.crimsonguitars.com/collections/fretting/products/fret-rubber-fret-polishing-abrasive
There are loads of cheaper versions available on eBay but I’m not sure on the quality.
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The crimson fret rubbers are basically their version of Garryflex which has been around for aaaaages, comes in bigger blocks and is cheaper.
My frets are a state. Are these kind of pads the best thing to use to polish them up if I want to avoid wire wool?
https://www.stewmac.com/luthier-tools-and-supplies/supplies/sanding-and-polishing/micro-mesh-soft-touch-pads