The thin pentel white ( you can get em from staples,office depot, etc in the marker/pen section, usually next to the thin tip gold and silver paint markers) Are what i use. But only if im using it for alchohol based. Deco white is shit. For white highlights and other things in the book, A white out pen does awesome. Just be careful about how much pressure you put on it, because iv fucked up a few sketchs with them.