If cover scent worked then a deer couldn't smell the weak scent you leave on brush or the ground because the ground and brush has a much stronger smell then where you stepped or touched. You can't cover a weak scent with a stronger one...not with animals like deer and dogs. They can pick out odors on a molecular level. Keep down the foreign and bacterial odors and play the wind.
Fitzgerald Deer Dander. http://www.cabelas.com/product/Team...+dander&x=6&y=3&Ntt=deer+dander&WTz_l=Unknown