When I crossplay, I have some men's deodorant I wear. The scent isn't overpowering, but it's definitely male. I don't know if it helps with the passing or adds to the character for others, but for me it gives me a little reminder that I'm a guy right now.
Currently working on: 20th Century Doctor Who Fangirl, Star Trek Fangirl, Steampunk Dawn
2018 Conventions: Marcon, DragonCon