We use Newman Roller Frames and have always had trouble keeping track of what mesh is on them. “Permanent” marker is erased after a few screen washes. You can’t etch the metal as the mesh on any frame might eventually change.  A tip of the proverbial cap to Erik at Saati for this trick

We bought a whole bunch of zip ties, they cost pennies. We now attach a different color zip tie to each mesh and have the codes around the building wherever screens might visit. A couple things we learned:

1. Colors don’t read that easily under safe lights, so we put the ones that look similar on very different mesh counts.

2. After trimming the zip ties, the ends are sharp and the cut ends need to be turned away from the outside.

3. We initially were going to put them only on two cross opposing corners but even that little thickness makes a difference and we are putting them on all four corners.

Not only do we now know what mesh we are dealing with, you can pull a screen out of a pile or closet when looking for a particular mesh.

We worried about screen cleaning knocking them off etc. No problem, they have gone through a few cycles now ok.