Normal masking tape, also known as crepe or tan style masking tape, is not recommended for use on cars due to several reasons.

1. Automotive paint jobs require a high degree of care and attention to detail, and using the wrong type of tape can lead to problems with the edges and prevent the painter from achieving the desired finish

2. Automotive masking tape is designed to adhere to various surfaces, including different types of plastic, metals, rubber, and chrome, and to conform to the curves and ridges of a car's body work

This is important because cars are made of a variety of materials that need to be protected during painting, and the tape must stay in place during the curing process to prevent bleeding.

Automotive masking tape is also designed to withstand high temperatures during the curing process, and it is sold with a specification for the temperature it is suitable for

Choosing the right tape for the right paint is essential in getting the best possible finish

In contrast, normal masking tape can bond with the surface it is attached to, making it difficult to remove without leaving residue or damaging the paint

This is because normal masking tape is designed for household use, where the surfaces to be masked are almost always flat or minimally curved, and the paint is typically thick emulsion that does not require curing

In summary, while normal masking tape may be suitable for household painting projects, it is not recommended for use on cars due to the specific requirements of automotive painting and the properties of automotive masking tape. Using the wrong type of tape can lead to problems with the paint job and damage the car