I have tried all sorts of furniture sprays and the likes to putting some sheen back into the coverings of record players, radio and tape recorders and by far the most successful is "Black in a Flash" by TURTLE WAX. Don't be put off by the "black" in the name as unlike others it's a clear/cream liquid so can be used on any colour. It's main purpose is to restore colour vinyl trim to cars, hence found at car accessory shops like HALFORDS. It cost £5 and there are others on the market but avoid as most I have experimented with remain sticky to the touch.
