Then taking my waterbrush I drag the colour into the middle of the image whilst blending. If I want to add more colour afterwards I then either colour directly onto the image again with the pencil to build the colour up or take some of the colour off the pencil directly with my warebrush and colour onto the image.
I hope that this may have helped some people. With regards to the paper I use, I actually rarely use watercolour paper, mainly because I cannot find a colour that matches my cardstock. I usually use fairly thick card so that it doesn't warp with the water. The great thing about watercoloring though is that lots different types of card work well, smooth or textured. If I am using my Whispers brush markers to colour in an image I usually use this method too! I love watercolouring and it is probably the technique that I use the most.