Magnetic signs go through stages of popularity- but they are still a good changeable sign- there for when you want to advertise your name, and removable for privacy later, alternately, one set can be used as required on a few cars or utes, or several sets can be made, for your staff to use to promote your business name when they are out in the traffic, without the 'fear' of permanence.

They are still however only a temporary sign, and must be considered as such.