OK, I finally got around to doing this again because I wasn't happy with the alignment the first time. I also cut the I.S. differently this time to conform better to the ring.
Here are the materials you'll need to do this:
1. Invisible Shield or some similar product
2. Solution to wet the I.S.
3. Razor or sharp scissors to cut I.S.
4. Ruler
5. Cardboard tracing template
First, create the cardboard tracing template. The one I used looks like this:
The measurements for this are 2.5" L
and .5" W
Note: You can shorten the length because there will be overlap when you apply both strips. It's up to you how much overlap you want.
Using the template, cut 4 strips from the I.S. You will need 2 for each ring.
Peel off the I.S. from one of the strips, and using either the spray bottle or your own solution,
lightly moisten the sticky side of the shield. You don't want water dripping from it and falling on the bag during application, so shake off any excess water.
Starting from the top of the ring, line up the I.S. so the "V" cutout lines up where the ring meets the strap. Remember, you are applying this on the underside of the ring. Be careful and patient. It helps to have someone else hold everything out of the way while you apply the shield.
Keep pressing down on the I.S. as it dries. If any edge lifts up, apply pressure for a few seconds on that spot. Smooth out any wrinkles. As it settles it should look like this:
Once it feels firmly in place, you can repeat for the other half of the ring. No need to wait very long.
After everything is done, make sure there are no peeling edges anywhere. And pat yourself on the back...no more black marks!