Polished buttons

Polished buttons are obtained by polishing regular buttons (use right click on them). One then reads: "you rub the buttons on your clothes and they become more shiny".

One may get the buttons by pickpocketing H.A.M. members, by digging in the Level-1, level-2 or level-3 dig site east of Varrock, opening Ogre coffins, or the Fishing Trawler.

They are used in the Animal Magnetism quest.

Since these are found in members parts only, it is unusual to polish them in a F2P world, althougth in the Crafting skill book it doesn't say Members only, so if a free member got their hands on these they can polish them.

Use in arbitrage scam
Players would sometimes trick other players, usually non-members, into thinking the item was rare, and other players would sometimes trade up to 100,000 coins for them. Because of this, Jagex made them untradeable in the 20 November 2007 update.