The real game-changer is scanning or photographing your original parts in high resolution before modeling them - that lets you check the fit by applying the image as a texture in your 3D software, you save a ton of time and avoid nasty surprises once it's printed. After that, yeah, the finish depends on the type of machine, but even basic post-processing (light sanding + primer) can turn an okay part into something that really holds up next to the original pieces 🔧 The real bottleneck isn't the technology, it's the learning curve to master the settings specific to your setup.