C250 W204 - Chrome Roof Rails - Cleaning?

[mpc]

Does anyone have any tips how to get a shine back on the chrome roof rails. Over the years they have obviously deteriorated with weathering/tree sap/contaminents.
Any tips on how to clean up again?

 

[Bri]

Try WD40 brought mine a treat

 

[mpc]

Try WD40 brought mine a treat

Just tried WD40 and it worked a treat.
Why is this!?

 

[Stardelta]

Just tried it as well, top draw, thanks for the tip!!

 

[Bigdrew]

Hi try a very fine wire wool with t cut works wonders
got this tip from a valeter who use this on chrome tail pipes