For the polished stone technique I have just always used my stamp pads and no reinkers.
I first choose 3 colors that I like the best and I take my sponge and dab them on lightest color first.
Then I spritz with alcohol and take my heat gun and watch it marbalize like, I do this step 3 times.
After it is done you can take staz on and and stamp images or anything else you want to do with it.
Also when I am stamping on vellum glossy CS etc I use my brilliance pads, and I love them
For watercoloring with your markes take a piece of wax paper or like a plastic buter lid and scribble with your marker sprtitz with a lil water and watercolor or use your aqua brush