If your reference to Sally H2O2 cream was the stuff I used (ie: hair bleaching/coloring products), don't do it ! It messes with blue and black plastic, to the point of it not being blue or black anymore. Its use was an experiment gone wrong. We now know better because of it, and the Xanthan gum mixture is the preferred route.
Two things; I am amazed at how much more powerful the sun is than that apparently-strong sun lamp, and also that my outdoors results seem so much quicker that what others have reported.
I'll invite comments and questions.
Being as we are having beautiful summer days here in Michigan (USA), I decided to take advantage of the sunlight, out of doors.