Soooo… we should get a cover?
I’ve seen these two (purple one is just an awesome mount, not cover, but perhaps could be made as cover, too):
But you will need to search around, can’t remember who made that plastic one (psychotiller?), although it looks molded, no idea how to make that purple one either, you would need to find the original author of these.
dont think so, no. “sandblasted” is a purely cosmetical thing - there is nothing but fine dust inside my motor, anything bigger gets catapulted off by the wide rotor support struts as you can see from the impact marks. 
That purple one looks like a custom molded unit by @hummie. I’ve got one and it’s rock solid stiff, but not adjustable. Also has a nice big scrape on the bottom, so at least as a skid plate, it’s doing it’s job. Lol
If you use larger wheels, there will be less scratches. Belt drive often get rekt faster than hub drive. However hub drive will get scratches too on the hub cover plate after several rides. Both is unavoidable minor damages as eboard are so close to the ground.
Cover is a great way to cover motor from dust, but also a great way to kept the inside dust inside. Another tips is to use RAW trucks, so your scrathes is not visible.
With a cover, I would be worried about something getting stuck between the cover and the motor. That could really suck.
Example:
Vibration Shattered Yuneec E-Go fan blades pinned between the outrunner can and cooling cover.
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Could you share a picture of the coke can?Does anyone thought about high density stainless steel mesh cover? Let’s say like mesh 40 or even 100. Motor itself is waterproof so our only concern is to keep dirt and rocks away from the motor, stainless mesh shouldn’t affect airflow so much, heat radiation should be almost the same. You could simply take the cover and wash it. Isn’t that better idea than solid abs or even carbon cover ?
To check this idea we need to bend the wire, cutout mesh with scissors and hotglue it i think. I’m right now in the middle of building my esk8 but for sure i will make one for myself.
sounds like a good plan! Post pics, let us know know how it goes
I was looking into this for incase I roll over a puddle. Would that not effect the bare motor?
brushless motors are naturally water resistant.
Oh, ok. Thanks. I guess I was worried about nothing
exactly 
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as many motors I have seen all of them have hall sensor PCB plain without any protection, I will be going to apply a coating on mine for sure to make 100% water resistant.
obviously you can’t drop it in your brothers fish tank, but a puddle every now and then will be just fine
kind off… PCB can corrode and etc
that’s why you can’t drop it in your brothers fish tank…
So I can drop it in my own right? 
of course you can!