For your faded wiper arms - not cheap but goes a long way - Gtechniq C4 Permanent Trim Restorer
https://www.amazon.co.uk/s?k=gtechniq+c4&adgrpid=54783026153&hvadid=259073162859&hvdev=c&hvlocphy=1007326&hvnetw=g&hvpos=1t1&hvqmt=e&hvrand=12251867971172660909&hvtargid=aud-615115051421%3Akwd-312246140150&tag=googhydr-21&ref=pd_sl_61ty34e96u_e