Maybe a stupid question, but if you do a stencil dye first, can you do a SC dye after? or should you always do SC then Stencil. I was thinking of dropping some color behind my sugar trooper, just dont want to destroy it.
You can, but it will need to be masked to prevent the original piece from becoming dyed as well. The black lines should be fine though.
I've found that if I dye the black lines of the art work then take away the background mask then I can dye the back ground cleanly (as long as it's not spike-it used to dye the background). Spike-it will eat the adhesive off of vinyl in my experiences.
Once the black lines are done you can peal the background and have at it with little fear (I use iDye Poly for backgrounds when I plan to dye a foreground). Then can peal the foreground and use finer techniques to fill in foreground as needed using shaving cream to hold the dye to within lines (i loved coloring books growing up).