I got an e-mail today about a post on Splitcoast Stampers about using Copic markers on shrink plastic.  The answer is an absolute 'yes'.  And the reason this is even a question is because the ink you would use to stamp your image is likely Stazon, which is solvent-based; and with Copic ink being alcohol-based — the two don't 'get along'.  One wipes the other right off. 

So here are a couple 'tricks' that I use to get the job done.

If using sheer polyshrink, I tend to stamp my image on a piece of paper, and place my shrink plastic over the top while I color, using that image as a guide. Then I stamp the image with Stazon over the top of the colored image.

If I'm using white / opaque polyshrink, I tend to stamp my image in Dove Gray Stazon (very lightly) and do my coloring on top of that, avoiding the lines as much as possible. But this color is so light, it doesn't bother me much if it gets on the tip of the pen.  Any discoloration is purely cosmetic.  Once again, I overstamp the image with the desired color of Stazon over the top of the finished coloring.

A stamp positioner or clear stamp is a must for either of these techniques.

This is the pre-shrunk image, it's definitely not perfectly placed for the overstamping step, but since it is shrinking – I'm not too worried about that. Nobody's perfect:
 

I love using my Nestabilities as a guide in my design too. The polyshrink image tends to be layered two sizes smaller than the size you start with – so I start with the Nestabilities that is about the size I want that piece to be layered with and go up two to cut my polyshrink. The polyshrink package I've got says a shrunk image will be 45% of starting size, but this gives me a better visual to start with so I can use the piece in a scene, such as the one I created with this finished card:

I used the Copic ABS-1 Airbrush to create my sunset background.  I simply masked off the sails on my two boats so they wouldn't be colored as I put down the three colors of my sunset.  I didn't care if some got on the water, because water would naturally reflect back these colors anyway.  I did add a bit of yellow and pink highlighting to the edge of the white sailcloths.  The sunset was made with YR61, R34 and R85.  I went with colors that had a higher grey values to give it a more dusky look.

Supplies:

• Rubbernecker Stamps (sailboats, bathing beauty)
• CTMH Stamps (footprints and sentiment, Do Nothing stamp set)
• CTMH cardstock and 'Laid Back' patterned paper
• Spellbinders Labels 3 and Labels 4 dies
• Memento Danube Blue ink
• Stazon Jet Black ink
• Ranger Peach Bellini ink
• Copic Markers, RV23 RV25 RV29 R34 R85 BG000 BG01 BG05 YR00 YR61 YR68 E31 E55 C1 C3 C5
• Lucky Squirrel polyshrink translucent

• CTMH Bookplates chipboard

So go ahead and shrink something.  And enjoy this Memorial Day weekend.  Yep, we are hitting the beach…