A weed is only a weed if it is unwanted. Roses can be considered weeds, as can mint, especially since they know few bounds.

I've made a really nice hand scrub of 1 part brown sugar, 1 part white sugar, and 1 part coconut oil. Very simple, but it gets the job done and really cleans off the skin. It can, of course, be perfumed with additional oils - I might try mint the next time I try it out.