This stuff can be pretty sticky and time consuming.
I ran these motors for quite some time during stress testing for a drawing robot and it baked the labels on. Very ugly site after an attempt at removal.
Here’s what my friends told me to try:
1) goo-gone (http://www.googone.com/)
2) nail polish remover
I was easier to find a woman with a purse full of stuff than a hardware store so I came up with some nail polish and it worked great. Next time I’ll remove labels before they get baked on!