I have an entire AR-15 lower that I 3D printed from carbon fiber reinforced co-polymer polyester. I probably spent 10-minutes cleaning it up after printing. It has had over 1000 rounds through it, and has been exposed to harsh cleaning chemicals. Zero issues. We use FDM and SLS 3D printed parts on assembly line production machines and testing machines, to make individual pieces of equipment that retail for upwards of $250,000, on long runs, with perfect repeat-ability. Little to no cleanup, constant exposure to harsh chemicals, and cyclic exposure to high intensity UV light. Zero issues. If your 3D printed parts are not long lasting outside, you are using the wrong material.