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To Kerouc11: VTar is made of whole coal tar. Most tars are considered substances that "are known or suspected to cause cancer". See http://www.cancer.org/docroot/PED/content/PED_1_3x_Known_and_Probable_Carcinogens.asp So you'd want to research VTar's ingredients and its safety carefully before you begin putting it on your skin.

Unfortunately the Excimer Laser for re-pigmentation requires continual maintenence (for life): "A major limitation of this new therapeutic intervention for pigment correction of scars and striae alba is the need for maintenance treatments," the authors write, noting that patients with lighter skin types would likely require maintenance treatment more frequently (every one to two months) than patients with darker skin types. Increased risk of carcinogenesis may also be associated with cutaneous use of the UV-B–based laser therapy. "Inconsistent results regarding squamous cell carcinoma and other non-melanoma skin cancer rates in UV-B–treated patients have been reported; nevertheless, the calculated increased risk appears to be low," the authors write. Taken from http://www.medscape.com/viewarticle/487771

Some of the supposed existing treatments for hypopigmentation are lasers (Relume; Fraxel), tanning accelerators (Novitil), creams (V-Tar, which is coal based and may be carcinogenic), steroid creams or immunomodulators (Protopic; Elidel), melanocyte transplantation procedures, and vitamin therapy (US Patent Application 20040170702).