I have heard if you use an active oxygen component (like vanish oxi-action) with the peroxide it improves the results. Also uv light is needed to make it work correctly - effectively the problem is resolved by that which caused it
My 1st posting! Nice review - generally I'm not into the newer stud less technic but this set appealed to me as soon as I saw it. Should have it in a week or two and can't wait!