Shoe polish might work until you got your hand sweaty and rubbed your face.
Maybe try some of the Forever Black trim product, it has black dye in it but it will not replace the finish where the leather has worn thin. You might could try that over an application or two....more??? Only if the finish is ruled as unimportant.
I don't mean to be nosey, but are you buying this car for yourself or is this part of a job you bid?
Steering wheels are NOT an easy job to do unless you have time, material and the right tools, so depending on what your circumstances are, you may want to opt for something like this, in universal fit (less expensive) or custom ($duh).
Vehicle Search - LeatherSeats.com
(Trust me it will show you steering wheel fixes)
I don't know if I'll get in trouble for that link or not (I'm not an agent or representative!), but that'll give you a couple of quicker choices for ideas if you need this done relatively soon and better than a cheap lace-up from the Checker Auto (no disrespect, it's just not their bag).
And be very careful that you don't accidentally deploy the airbag!
Hope that helps!
