Grunge Rainbow Foils

So another Pinterest find has inspired me, and now I can't find it to show you the original (don't you hate that?). Grr.

How to achieve this look:

Paint nails black (I used Sinful Colors' Black on Black)

Apply foil adhesive on the top 3/4 of the nail.

Apply the foil (it's okay if it's not perfect, holes will make it look better)

Take a fan brush, and brush upwards, creating rough edges along the sharp line created by the edge of the foil.

For the rainbow, I used two separate foils from Dollar Nail Art: Citrus Flash and Wildberry Flash to create the rainbow effect. 

The adhesive reacts to certain topcoats, so don't use anything that's fast drying. I used Revlon's Extra Life No Chip Topcoat and it doesn't seem to react like the others.