3M has a new fine line masking tape.
our body shop used to use the blue vinyl tape. it worked great, much better than the light green tape, but doesn't like to stick long term in the curves. we now use a light purple tape. it has something built into it so it makes bends and stays there, i don't have a part #. when i order it from the paint store salesman i just ask for the 3M purple tape and he knows what i am talking about.