I cant answer that. It seems to me that on paper, Brass will wear faster than alumimum, so this might not work for you. Aluminum (for me anyhow) gets that nasty pitting and build-up on it - that stuff drives me nuts (it bugs me so I clean the terminals often).
Do you think you burn/wear away the contacts because of a hot spark, or could it be a run-out issue, and the damage is physical (rotor whacking the terminals from excessive dizzy bushing play)?
If I was having problems with alum, I'd try brass just for the sake of experimenting. That's just me.
Good luck.