
I tend to use polish although it wont help the edges retain their colour in the long term. If you can get hold of some leather dye (Saphir teinture francaise) you can use that to re-colour the edges after which you can use some polish to get a shine. I'd use polish in the same colour as the sole's edge.
Not sure where you are located by AE edge dressing with free shipping and very decent prices seems hard to beat.










