i think that's the same kind i had, though I think the thing I used was a metal scraper for cleaning a stovetop? lol at least i think...
it looks kind of like this
Poor Piggy! It's a good thing she's loved now. What kind of a cage did she come in? My old cage got stained in the corners so I took some sharp scrubby thing (and vinegar) and worked at it for a while until it came off.
great idea! i was actually just wondering what I could do (for my guineas) with all my book covers left over from the year (from all my textbooks). I will have to try this!