I copied and pasted these instructions from Kristina's VSN's challenge post. Hopes this helps.
Follow these directions to make a card using the Streaking Technique:
#1 Wet a cotton ball with rubbing alcohol and place a few drops of reinker on it. Drag the wet cotton ball across white glossy cardstock. Add more colors or leave it as is. Do one color at a time or many together. It dries fast and will be ready for use as a background or to stamp on in no time!
Example:
http://gallery.splitcoaststampers.c...&cat=500&page=1
#2 Limited Supplies? You can get a different streaking effect by dragging your cardstock against your stamp pad. Lay the cardstock on an open stamp pad and drag with moderate to heavy pressure.
Example:
http://gallery.splitcoaststampers.c...&cat=500&page=1