Same! I did a test w/ nail polish and didn't care for the initial results.
I used THIS wrap. As for my process I created a template with basic white making tape to cover the red on the boot then traced it with a sharpie. Carefully pull off the tape and stick it flat on top of the wrap, trim w/ utility blade and apply to boot with a little heat where necessary. I made my template slightly larger after first test cut just to make it easier to cover the red. As for the tendon - I just hit it with an industrial sharpie. We'll see how well it all holds up!