IE: Which element would Fire signs best be suited for? What about Air signs? And water signs? How about earth signs?
what do you mean by lines? if you meant flux !!! there wont be any real and reasonable device for that.
I make 3D art with epoxy resin, and I mix all kinds of things in itwatercolor paint, acrylic and pigment powder. The thing I found is that if you are using a resin where you have to mix hardener and the other liquid (I forget), add a tiny bit more hardener than the instructions call for.