The neutral rust remover can not completely replace the grinding wheel rust removal. For some rust and dirt that are more difficult to remove, the rust removal of the grinding wheel may be more effective, but it will also cause some damage to the metal surface. Although the neutral rust removal agent is relatively mild, but its rust removal effect is relatively poor, for some more stubborn rust and dirt may not be very effective. Therefore, in the practical application, the grinding wheel rust removal or the neutral rust removal agent can be selected according to the specific situation, in order to achieve a better rust removal effect.