Unless you really know what you're doing, don't do it... You'll probably make it worse.
Post up a pic or something so some of us can get a better idea. How small is it? Is it really noticeable? Might just be something you treat with some leatherique or something and let it go, especially if it's on an area that will get worn anyway.
'11 BMW E92 ///M3 - ZCP and DCT
'13 Toyota Tundra - 4x4 Platinum CrewMax, 5.7l iForce V8