If I were going to try to remove just the color above and below the switch I would try to mask the areas I don't want removed with some kind of rubberized tape. I wouldn't spray the cleaner on heavy as it could seep under the masking. I would try applying it by spraying it on an old cloth and rubbing or dabbing it on. Wear gloves of course!
When I get a chance I'll try it later with my spare cross guard cross so you can see if it's worth trying. I'd hate to see you Prophecy come out a mess.
Woops! Sorry for the late reply =S Aaaww, thanks! Much appreciated! I don't have a dark prophecy that I could ruin yet anyway, so don't worry, I'm not in a hurry XD But yeah, masking off the other parts would be quite tricky; since the prophecy is a hilt with no removable parts, good masking is essential! I was thinking of maybe masking it with heat shrink plus electrical tape on the edges, just in case the products seeps in through the normal masking tape. And yes, gloves are a must!