If you are wanting to mark trees that need to be chopped or pallets that need to be colour coded one of these products will work for you.

• Hard Lumber crayon is durable and versatile and can go on any surface.
• The Lumber marking ink is water based and non toxic, it is weather & water resistant.  Depending on the application used either wood stamping ink
  wood spraying ink will do the job
• Mine crayons
• General purpose markers
• Flourescent markers