I need something to guard the motor from scratches
I hear that a vinyl wrap is effective for light use. Lots of people like to use carbon fiber wrap.
Like this, except you could buy in smaller quantity.
Regarding covering your belts, I think the best option is going to be a 3d printed cover. Because most builds are all slightly different I don’t think there are any readily available covers that you can buy. A custom solution is likely necessary. But then again, it would help if you gave some more details.