SEM interior dye?

SEM works well. Thorough cleaning is a must. After prep work, make sure to use multiple light coats (I used Landau Black from a quart can in my air brush). Something you might consider if you need to color cloth fabric... work the wet dye into the fabric with a soft bristle brush, to avoid what 69signetV8 described. Practice on something else to test the technique.

Good luck,
Jerry