Alloy window posts refurb/replacement

[Vanhelsing]

My window frames are looking a little tired after 16 years of service. Has anyone refurbished these or is it a case of replacement. Tried alloy polish but not much change. Any suggestions really welcome

PJ

[rabowman]

Belgom Alu cleaner is fantastic and made a huge improvement on all my ally parts.

Full details on Google

Rob