My new favourite product is the Tim Holz Oxide Distress inks. They work so great on watercolour papers but I have found them to work really well on Vellum/Parchment paper as well. Here is a really quick card I made trying the inks out. The background watercolour card has been embossed and then wet and smooshed over the inks on an acrylic block. The stamped image was heat embossed with silver embossing powder and then sponged with distress inks and the peacock coloured with gel pens.