hm that a good question.. i think if your dreads are pretty thick itd be really hard to spike them because of weight.. ive never tried it.. and im letting my hair dread itself lately with some help of teasing a little bit. but i think if your dreads are thinner than average itd be easier to spike. good luck though!! spray the shit out of them lol
There is the typical answer Knox gelatin and got2be products, but I am going to suggest something that may or may not work. Pipe cleaners. In elementary school I dressed up as Pipi Longstockings and put pipe cleaners in my braids so that they would be crazy like hers. Maybe something similar would work with out the damage and gunk buildup that sticky gooey hair products will leave in the dreads foreverrrr.