Go ahead and put a bit of tape on the metal grippy bit.

 

^^ This.

 

I put a bit of shrink wrap tubing on the bare metal part on the left. The sliding part I think is plastic anyway, or at least feels unlikely to scratch anything.

It's odd the manufacturer doesn't do something with them, given every one you see in a YouTube video or such has something stuck on there.

 

Never had an issue with mine, but I am careful when I place it on the slider bar.

 

Yes, it can leave marks on a highly polished case if not careful. I simply place an eyeglass cleaning cloth under any watch with such a case. It does not interfere with microphone pickup.

 

I put Electrical tape around the steel mic pickup.

 

Same here.

 

Thanks everyone for the excellent advice!

 

Tape the metal bits. I was a noob and didnt think of doing it until i put a scratch or two on a watch.

 

Oh, and to the OP: Glad you got a 1900.
I started out with a 1000, and outgrew it in two weeks.
The 1900 does 7 across sampling, and does fractional seconds. It's so much easier to adjust a watch or check the function of a watch when you can see it as 7.6 s/d instead of just 7 or 6.
Plus, it has greater resolution, color, and two display modes.
For some reason, most people don't think it's wirth the $50 upgrade. The 100 oversells the 1900 at least 10:1.

 

Yes.

Scotch tape works great. One piece on either side of the crown and one piece on the opposite side. I tried the electrical tape on the microphone but found it damped the sound too much and fell off frequently. Easier to slap a little scotch tape on with each use.

 

Thanks, comrades!
The tape (blue) works a treat.

The metal for the microphone is coarse and sharp, it would most certainly stractch the case of a watch. Highly surprising that Weishi haven't used a safer alternative.