For parts intended for outdoor use, and for fused wire deposition, I recommend ASA. This material is very resistant, both to weather and to sun and aging due to UV rays. And it is available in many different colors. ABS is also a robust material, but its properties are not as good as ASA's when it comes to outdoor conditions. Otherwise, PETG can be a good alternative. It is robust and offers good resistance to UV rays. And it can be found in various colors. As for Nylon, and in particular PA12, it is indeed an excellent material with good mechanical properties, but preferably with SLS technology (or MJF if we stick to powder bed technologies). Associated with fused wire deposition, PA12 is not as resistant.