I would recommend avoiding flour. After a few days it will begin to rot and stink to kingdom come. I use cornstarch in mine to make a thick napalm style mix. Makes it easier to store. I add water as required to get to flow only when I'm filling the grenades. And food coloring may end up staining clothes. I'd stick to something like Crayola washable finger paint. I busted out 25 of these in about an hour over the weekend. To fill I went with a 3 gallon Ace pump sprayer. Just unscrew the black nozzle tip and slide the tube over the end. (I use a hemostat to help clamp it on to prevent a mess) Unit cost for all the bits and bobs, plus paint comes out to about $1.25 per grenade. And you can make them as big or as small as you want. Def the way to go if your not affraid to invest a little time. I don't know WHO is getting defensive about their paint mix but here is mine. Seems to work well:
Crayola Washable Finger Paint(Comes in tubes)
Boil water, add the cornstarch to make a thick milky white glob. While still warm add a tube or two of the paint and mix well. Let cool. If it cools to be super thick then just cut it with some water until the proper consistancy is reached. You can try adding somthing for smell, I've heard some folks use Vanilla extract. Isn't a big secret, just some common grocery items.
Last edited by ace_austin : 08-01-2012 at 09:21 PM.