I think you have to think safely about anything you use. Some of the paints I spray are water based but the ammonia dyers can give you a real headache. Although it takes quite a while for lead to build up in an adult to dangerous levels ,any time you melt (smelt) metals the fumes can be harmful. Some wood resins are harmful also. I have been woodworking since 1968 and have had no ill effects (I am knocking on wood now) but have always tried to make sure resonable safety precautions were made. I do unfortunately know of others that have not fared as well.
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