S124 roof bars

[RKC-benz]

Hi folks

My 20 year old S124 looks good enough at a glance but I want to renovate the finish on the roof bars. The bars are meant to be black and look like they are painted. The finish is matte.

Can one of the experienced detailers explain what I need to do to giving them a lasting improvement? I am wary of just putting on a black restorer because I am wary that it will just leave streaks over the white paint...

Thanks in advance...

 

[RKC-benz]

Anyone?

And should W124 roof bars be matte or is that just the oxidation? We're they once gloss?

 

[SL300-24]

I think they were a satin finish originally...