What is How do I clean a FDM 3D model without supports?

To clean an FDM 3D model without supports, remove filament strings with tweezers or a hobby knife, smooth layer lines using sandpaper, and wipe the surface with isopropyl alcohol. This targets common post-print issues—like stringing, visible layer lines, or grime—without support-removal tools. Tweezers gently pluck fine strings, 100–400 grit sandpaper gradually smooths layers, and 70–90% isopropyl alcohol cleans dust/oils without damaging PLA/ABS. For stubborn layer lines, test a low-heat gun on PLA (avoid overheating to prevent warping)—it slightly melts and smooths surfaces for a cleaner finish.