prisma pencils and shrink plastic

Can you use prisma pencils and sansodor with shrink plastic? I'm a bit wary in case the sansodor turns out to be flammable once in the oven!

I have used prismas on shrink plastic. Not blended as you need to remember the colours go darker when shrunk so go lightly with the colour.

I hadn't thought about the colours going darker, so thanks for that tip.