I have a Pure One Flow Radio. This model has an odd finish, which is like a soft touch matt. After several years- I'm not sure how long I've had it- I bought it when Comet were closing down so a good few years, the finish looked really grubby. I used my usual foam cleaner without any real joy. Then I tried some alcohol which has removed the finish to show a shiny finish over most of the case. No real problem, if I can remove it all. In fact, it will look quite smart, if not better than before. Looking on the internet, it seems this is a known problem with this radio.
Someone has suggested that Tea Tree Oil is the 'magic' way to remove the odd finish. I've only heard of Tree Tree Oil being used for cosmetic purposes.
Has anyone tried it as a solvent or does anyone know if there is a solvent mixed with it?