Take note this was done with measurements for a fork with 32mm stanctions.
What you will need:
1 roll of electrical tape
A ruler(not pictured)
1 zip tie.
Measure out ~ a 4" peice of electrical tape:
Stick adhesive side of electrical tape to the backside of ziptie:
Fold both sides to the front of the ziptie:
Check and see if any of the tape needs trimming, if not then zip it down to a point where it will slide on stanction easily, but will stay in position, shouldered side facing outside then cut off excess ziptie:
The electrical tape is smooth and slick enough that it won't ruin the finish on the stanctions.