Correct on the expanded metal. That also bothers me on nice frosty morning climbing up into the stand, and also walking to my stand my boots will collect some nice bits ofdirt and sand.If your not careful moving your feet on the platform it will knock these bits off alerting every deer for 20 miles.

Now I try to make sure my boots are super clean when I start to climb up.
Learned that one the hard way last yr being the first yr I ever hunted from a stand.