Only on walls ;) FYI guys... I encourage you to boycott Krylon wherever possible. They have a long history of making money from graffiti, and then stabbing the wirting community in the back, and then jumping back on board, as they see fit. Basically they're weak as piss and won't support/will sell out the people who made them as famous as they are. Edit: On a less political and more practical note, they are not averse to releasing an excellent product, and then changing to a crappier watery formula later on, while keeping the same branding/ naming/ packaging, so you never know what you'll get until you start to spray. I recommend Montana brand paints these days....