1. The applicable working environment of various anti-rust paints are different. Therefore, Pay attention to working environment when choosing is necessary.

2. In addition to the primer, the cast iron surface plate must be painted. The topcoat is mostly done after machining. Therefore, the adhesion between the primer and the topcoat should be considered. Usually the primer and topcoat of similar paints are matched and have strong adhesion. The primer and topcoat of different types of paints may not be compatible and cannot bond well with each other. Therefore, it is necessary to understand the performance of the paint. 　　

3. Pay attention to the construction method of anti-rust primer, which can better guarantee the anti-rust effect.

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