Yes, the brass ones work just fine. As do brass embossing plates, die cut paper, hessian, lace (possibly my favourite), wire, and quite a lot of rather obscure foodstuffs (not always entirely intended for rolling). I do find some things work better in multi-part sandwiches - sometimes with two different metals, and as Dennis says, I tend to also include a layer of paper on the outside of everything in case it's either messy or potentially damaging to rollers. It's amazing how much goo can come out of a leaf that you really thought was thoroughly dry...
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