aww booo.actually...no...the wear is from normal wear and bumping, rubbing while being worn.
it's less apparent on darker colored bags but is unevitable im sure...
if he actual leather under the scuff is the same color as the bag, then yes, conditioner can moisturize the booboo...
but on brighter colored bags such as the pinks and greens and whatnot, i'd think you'd either have to get a colored shoepolish and use that on the scuff or a marker or something. leather conditioner wont do a darn thing on a scuff on a lighter colored bag...it's meant to provide slight protection from dirt, water and wear.
http://cgi.ebay.com/TARRAGO-Leather-Boot-Shoe-Cream-Polish-HOT-PINK_W0QQitemZ180210586480QQihZ008QQcategoryZ63889QQtcZphotoQQcmdZViewItem
oo pink shoe polish! id be a bit scared to use it on an mj but i would test it out if i had a faded spot.