Hard wax shrink wraps around the hair so it must be molded several times on application to fully coat the hair. This takes a bit of practice. If the hair isn't fully coated to the base of the follicle, the hair will break off leaving stubble.
NOTE: If you have coarse, thick, stubborn hair on the chin or lip, I suggest tweezing them before you wax the finer hair. These hairs are deeply rooted and will break off if you try to wax them, no matter what wax you use.
Pina Colada Hard Wax:
Pumpkin Pie Hard Wax: