Da Grey Mel would look spectacular ....
If ya have black/dark shorts ... No Problemo ....
The remaining residual is minimal .
Go for it ....
Use a horse hair shoe brush to deepen the patina.
I would still apply a bit of Proofhide once and awhile ...
But now a can of Proofhide should last 10-20 years.
I don't believe the Mel seals the leather. The leather still breaths.
If I am offering poor advice, I hope some one will correct me.