Rough golden surface paint weathering reveal aluminium layer Low-poly 3D model

Golden vase with nice topology as shown in picture. Vase built with loop tool, damaged shape with bent surface was created in sculpt mode in Blender. Base color, roughness image textures for aluminium material are created by myself, not by downloading from any online platform. So make sure they look realistic like a damaged vase with dirty rough surface, with paint weathering reveal aluminium layer below.

All images were rendered with Eevee. Render quality as shown in preview images.

Make sure quad only, no N-gon, no triangulates, no vertice with more than 5 edges in model , no UV overlapping as per CG trader standard, parameters were verified by Kodama. I also attached screenshot of verification by Kodama for the model. However, I got problem with UV stretch.

Total vertices: 2277. Dimension: 26.9 x 24.8 x 34.1 cm

Avaiable formats: fbx, glb, obj, stl. Images textures, UV map are in zip files. From my point of view, gld file could be the best one.

Any questions about working process to build these models, any idea to improve models quality, please let me know