I would do the same as you, Leftwood, if I had some really nasty dandy in the middle of a nice clump of lilies. However, I deal with a ton of peony and I prefer not to move them if at all possible. This is where the paintbrush and Roundup come in.
Regarding newspaper ink. The newspaper I use is printed with Soy ink. I wouldn't use the colored sections on food crops though. But for perennials and such, they are fine. For my food crops I just went to the local big box hardware store and got builder's paper. This is not Rozen paper, but pretty much the same as a paper grocery bag. Places like Gardener's Supply is selling the same thing for a whole heck of a lot more. I get a large roll for about $10.00. It's 35" x 140'. Check and see the price difference with GS. It seems to work just fine for my tomatoes.
