[Sakrison]

I score folds with a fat sewing needle in a hobby knife handle. For folding small parts, I use a locking or "reverse" tweezer (one that the spring holds closed) to hold the part and small regular tweezers to fold the part and glue it. (Think of it as getting in touch with your inner lobster.) I have about a dozen pairs of tweezers, half of them reverse tweezers, I find them useful for all sorts of things.