I too use the carbon fibre look decals, but i bought a role supplied for motor veicles, it was cheaper than the couple of pre cut decals at the lbs. And I have a life long supply.
I also use the plastic spiral cable neatners, I first used them to clip the computer cable to the brake cable, but now i have them on those intense cable rub spots. I just clip a section about 3-4 cm long over the cable at the spot.