Dear Waldorf Parents,
Just as "safe and natural" herbs sometimes have dangerous contraindications so do other natural products. Be sure to use everything you have with wisdom and knowlege - if it is "natural" or not!
There are many reports (confirmed by a firefighter as well) that cloths soaked in linseed (used sometimes to put a natural finish on wood or remove old paint) will SELF-IGNITE. Please be aware of this if you are going to use this natural product and be sure to clean and store cloths related to this oil properly.