Am new quilter and I did pre-wash all my fabrics and used a color catcher; one of my main fabrics (bottom of a block for 12 blocks) showed very little color bleed in the catcher so I thought it was good to go..........that was until having several blocks completed, I needed to wet spray a part to get wrinkle out, well you probably have guessed, it bled onto the sheet covered board I was using. My questions: How does retayne work? Would it be possible to use in a spray bottle to treat the bottom parts of these blocks to prevent further bleed or should I just tell recipient to be sure and use color catcher, there are all sorts of colors on the blocks and a lot of white too. Any other suggestions? Thanks so much for your input.