Airbrushing ??

Im new to crafting so still experimenting - i use sizzix a lot with Bazzill textured card but i want a more sophisticated look. I have noticed that other people add outlines and shading to the die cuts and it makes them look brill.

How do they get this effect? What do they use?

Any ideas is greatly appreciated.
TIA

You can ink the edges of your die-cuts. Most inks will work, although chalk ones can smudge. You can also use the edge of felt pens too.

Thanks for the advice!