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When paintballers feel ready for action but aren't sure where they'd like to do battle, they point their browsers to www.paintballpromos.com. There they'll find packages for nearby paintball fields, so they don't have to litter their own backyards with empty oil barrels and fill tiny water balloons with tempera paint. Packages usually include the rental of a marker and mask; paintballs and air fills are an extra charge at the field.