Salicylic Acid (acne wash) to address lingering redness
I stumbled across a potentially interesting idea for guys who have problems with lingering redness in the recipient or donor area. Salicylic acid (as found in liquid acne soaps like Neutragena Oil Free Acne Wash (and other brands) may be helpful, and deserve a look.
Salicylic acid is the same ingredient found in basic aspirin, and aspirin is anti-infammatory. Acne wash is intended to reduce the inflammation caused by breakouts.
I've been using acne wash on my scalp in the shower, at the same time I wash my face. It's hard to tell (I didn't document with before/after pics) but it seems like it has helped even out my skin tone. I follow the instructions on the bottle, and use conditioner afterwards (using regular shampoo to wash the rest of my hair). I assume acne wash would dry your hair out like any soap, so conditioner is warranted.
I wouldn't use this on freshly-healed grafts, I think 9 months or more post-surgery would be a reasonable time to wait, before trying this.