When working with filaments explicitly made for outdoor purposes, you must take extra care while handling them. They may contain harmful substances like lead, cadmium, arsenic, and so forth. Others such as ABS and ASA produce toxic fumes when heated up.
Therefore, before starting any job, ensure that the area around your workspace is clean and free from dust particles and any solvents. Also, wear gloves and goggles to prevent these materials from penetrating your body. Always keep away from children who might get hurt due to the careless handling of these materials.
You also need to make sure the room ventilation is perfect. Any fumes that will be produced during the exercise need to exit the building. Open all your doors and windows for maximum ventilation. You can also consider printing from a tent if your house doesn't allow free air movement in and out.