Im 21, automotive tech, body/paint man by trade, woodworking as a hobby, i enjoy metal work as well, im excited to get going with knifemaking. My questions to you, have probably been addressed, so forgive me. Ive made a simple forge, using a steel pre-heating propane torch, running into a small brick forge. Im doing it all outside, what are the risk factors of an explosion or fire here? Im no fool, but i have limited time dealing with propane, just dont want to have any bad times with that. Second question is regarding my insulation, ceramic fiber board, will it emit toxic fumes in which i need a respirator? Or being outside should i be okay? I know some risk must be involved but how great? I wear a respirator at work, sometimes all week in a paint booth, it isnt exactly wonderful, being 95° out. So if i can avoid it, i would like that. Thanks in advanced for my rookie questions.