Blue Peel will lighten your skin, as will any significant peel
All chemical peels (and laser peels for that matter) will lighten a patients skin. Realize that dyschromia (pigmentation problems) is one of the most common results of sun damage. Your skin makes pigment (melanin) to help protect it from UV rays. Over time, some abnormalities in pigment production occur and these show up as freckles, brown spots or staining, and generally, irregular pigmentation.
A chemical/laser peel will remove a lot of this pigmentation. Some of the deeper pigmentation...