Originally Posted by
Andrew R Stewart
The OP requested restoration advice. He now knows that most suggest replacement. Any other restore suggestions instead of piling on the replacement advice he didn't ask for? Andy.
Fair enough.
Depending on the type of vinyl, and if it has a smooth surface, he might use automobile rubbing (polishing) compound to buff out the dull surface oxide layer, and bring up fresh vinyl. A bit of compound on a rag or paper towel rubbing the cable lengthwise should brighten them up fairly quickly. Applying the brake, or pressing the gear lever to tighten the cable will stiffen the cable and make the job go fairly quickly.
They also sell products to brighten or de-oxidize the vinyl trim on car "opera" roofs. I've had good success with these on other vinyl applications.
BTW- there's not much you can do with the older PVC covered brake cable who's surface is textured. This stuff oxidizes (white turns yellow or brown) and the discoloration is through and through. This is why I hate and won't use white or gray cable housing.