Chrome has a deeper shine than SS but as said not for long...
You can polish chrome up to quite a deep shine, just by using soapy water and silvo metal polish (the liquid type), old school but works.
The bumpers and headlamp trims are genuine chrome and the grill surround is genuine stainless, and in no way was any of the bright work new before polishing.
Please correct me if I am wrong, but aren't the grille surrounds aluminium? It has been a while since I went over to the Mk1 set-up.
You've got me wondering now, as I know the bonnet lip on mine is defiantly stainless, but you might be right on the grill ends/hockey sticks.