Yeah you're right Alan, I'll do that. Though a part of me wants to re-do it with a paste with far less sulfur, and apply it more conservatively to see if the result would be more even. Then again I'm also afraid of overdoing the cleaning in a short space of time.
Also I think in my excitement I forgot that sulphur is no replacement for warangan, and expected something much more striking. It was a good learning experience though.
Anyway, I think I'll put this one down for awhile
Thank you everyone, particularly Alan, for the guidance and input.