Consistent results using Tamiya Tape
This tape makes laser straight paint lines. Don't stretch or pull the the tape. Lay it down flat and press down along the edges. Spray light coats to help seal the tape edges and build it up in several coats. Make sure your base paint is cured before using masking tape. Lacquer paints dry from the outside in. So it may feel dry but a strong tape may peel the base coat if you don't let the paint cure all the way to the body. I usually wait several days for the paint to cure before using any masking tape over a painted body.