Well, I always hated when people would mention an awesome product and then not show you where to get it. I actually get my walnut ink from an extremely well-stocked scrapbook store. They sell the luggage stamps as well, and bags of watch faces, sealing wax, etc.
It's sometimes hard to deal with the help -- they're all about scrappin', but they've given me good suggestions on distressing paper and such.
The rosin trick is actually an old magicians trick for using props in a performance. Smell can create such a strong mental image, it really helps when creating "props" that have a prediction or whatnot on 'em.