To modify the model, you can open the ".blend" file in Blender.

This model has such materials with the following 4K textures:

1) MI_WoodGlossyRed01

T_WoodGlossyRed01_AO.png

T_WoodGlossyRed01_BC.png

T_WoodGlossyRed01_MT.png

T_WoodGlossyRed01_N.png

T_WoodGlossyRed01_R.png

2) MI_MetalAluminumClean01

T_MetalAluminumClean01_AO.png

T_MetalAluminumClean01_BC.png

T_MetalAluminumClean01_MT.png

T_MetalAluminumClean01_N.png

T_MetalAluminumClean01_R.png