I had to laugh as I received sales emails about products and techniques that were popular many years ago. One of them was Peerless watercolor papers. I had bought these many years ago at a convention and never really used them much. I was about ready to discard them. I had mounted half of each sheet of intensely pigments watercolor papers onto cardstock with labels.
I have 7 pages like this in different colors. I mailed the half that I hadn't mounted to a friend. We're both trying to learn to use them. My first attempt was very dark, so my friend suggested I use wet brush to pick up color and put it on a 'pallet' (plastic lid for me) and color from that swatch. This is my first acceptable card using this technique.