Actually, the "whole supercooled liquid or not" question re: glass remains a bit open still. One reasonable discussion of it reaches the conclusion that there is no clear answer.
I think Krylon makes some. You might also try line chalk (for marking fields) or even tempera paint in a spray bottle (I've seen kits of spraying non-spray paint at paint stores). Try the paint stores or Home Depot.
If IBM were really clever, they'd "open source" the ad and publish {ps,pdf} versions of the stencils so others could put the ads in their towns. They could even include specifications for easily removable paints/chalks/etc. (colored hair spray would probably work wonderfully)
With the appropriate "this might be illegal in your area and, if so, it's your ass not ours" disclaimer, of course.
It would only take a couple of motivated people in each town to bring this to epidemic levels.
-John.
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Actually, the "whole supercooled liquid or not" question re: glass remains a bit open still. One reasonable discussion of it reaches the conclusion that there is no clear answer.
Or you could roll your own with this recipe. Some days I just love the net.
Searching in google for "spray chalk" led me to this. Did IBM say it would biodegrade quickly?
I think Krylon makes some. You might also try line chalk (for marking fields) or even tempera paint in a spray bottle (I've seen kits of spraying non-spray paint at paint stores). Try the paint stores or Home Depot.
If IBM were really clever, they'd "open source" the ad and publish {ps,pdf} versions of the stencils so others could put the ads in their towns. They could even include specifications for easily removable paints/chalks/etc. (colored hair spray would probably work wonderfully) With the appropriate "this might be illegal in your area and, if so, it's your ass not ours" disclaimer, of course. It would only take a couple of motivated people in each town to bring this to epidemic levels. -John.