This　study　investigates　laser　polishing　as　a　post-processing　technique　to　reduce　surface　roughness　in　ABS　and　Nylon　parts　produced　via　Fused　Deposition　Modeling　(FDM).　The　research　utilized　CO2　and　Nd:YAG　lasers　to　polish　these　materials,　achieving　surface　roughness　reductions　of　95.9　%　and　96.0　%　for　CO2-treated　ABS　and　Nylon　samples,　respectively,　while　Nd:YAG-treated　samples　exhibited　reductions　of　67.3　%　and　68.6　%.　Additionally,　the　study　explores　the　impact　of　various　laser　parameters　on　surface　quality　through　both　single-factor　and　orthogonal　experiments.　It　also　introduces　wet　laser　polishing　as　a　novel　method　to　mitigate　color　changes　and　enhance　polishing　effectiveness.　This　innovative　approach　demonstrates　substantial　improvements　in　performance　metrics,　underscoring　its　potential　for　industrial-scale　production　of　plastic　components　and　biomedical　implants.　The　technique,　in　particular,　shows　promising　applications　in　meeting　the　polishing　requirements　of　3D-printed　parts.　©　2024