Nice topology as shown in preview images. Cup and handle were made with loop tools, grease pencil not by modifying default object in Blender, I did not use any modifier or plugins. All images textures were made by myself. Make sure model looks realistic and light enough for room scene in both day and night time. Pictures with cup were made by render engine Eevee, easy and fast to create images in good quality without setting up too comlicated lights.

Only quad in model, no N-gons, no triangulates, no vertices with more than 5 edges, other standards also meet CGtrader requirement. Please see preview image, I also attached screenshoot for verification from Kodama. Total vertices: 384. Dimensions: 25.2 x 25.2 x 26.4 cm ( cup body), 9.3 x 2.12 x 21.5 cm ( cup handle).

I also uploaded Blender file with procedural nodes to make paint material and rust on metal surface , ready to bake image textures( Diffuse map, Glossy map, Roughness map, Normal map) . Please see preview images for your overview.

Avaiable formats: glb, obj, stl, fbx( both embed and no embed textures). UV maps, Image textures are in zip files

Any question about working process, any idea to improve model quality, please let me know