I’m always surprised at how many years traditional masking tape has been the only game in town. I’m also thankful that tape manufacturers have noticed the deficiency and taken action. A good example is called Edge-Lock Paint Line Protector. In tests I’ve conducted in my shop, it keeps paint out crisply as long as you remember to press the edges down firmly during application. Read more in my article “A Masking Tape That Makes Painting a Pleasure.“