I searched YouTube this morning on how to get rid of stubborn acrylic masking. One person tried olive oil and let it sit for 5-10 minutes and was able to peel the masking off.
As skeptical as I was I decided to try it…it WORKED!!! I left the olive oil on much longer than 10 minutes and could peel the masking and glue off with my hands. Washed off my project with soap and water.