Rinses as highlights

[Saraesa]

I have dark brown hair that in some lights look black however due to relaxers my hair also has a slight reddish brown tint to it. I was thinking of using some rinses to add "highlights/ lowlights" to my hair. So the question is will the rinses damage my hair? and how long will they take to wash out? because I'm fickle so I will want the color to go away. I was thinking of using medium golden brown and maybe dark red brown or using darkest brown with a hint of burgundy.
Any advice or suggestions would be much appreciated. TIA

[florenonite]

Rinses don't damage your hair, AFAIK. There's an expansive article by Nightshade in the articles section about herbal rinses for colour. I get the impression you want to lighten your colour with them, which you can't do, aside from with honey which is permanent, to my knowledge.