Well, despite of the fact that I have not tried doing aging on watches myself, but I did read it somewhere regarding this mod and pretty much it is easy to do and definitely a DIY mod.
Question being, are you familiar with disassembling the watch? If you are then you can definitely perform the mod yourself. If I recalled correctly, the mod involves of adding egg yolk and lime to the indices and the dial as well.
"Tienes que correr riesgos, en esta vida"