Eraser trick.....?

[JollySipper]

I am working on a BMW... the "kidneys" in the grill should be trimmed out in chrome, with their centers and the rest of the grill going black. My question is, can I foil the best I can, paint the whole grill, then use an artist's eraser to rub through the paint down to the foil?

[slusher]

Ihave never tried the artist eraser, but would a light damp q tip work with thinner. Hobby Lobby carries the Tamita pointed swabs.