1. Be sure to remove the oil stains, floating rust, and black oxide film on the surface of the workpiece. Pay special attention to the welding seam must be thoroughly cleaned up.
2. Before scraping, use 280-400# sandpaper to lightly polish the scraped surface to improve the adhesion of the putty; wipe the polished dust with clean, lint-free cotton, and then scrape.
3. It is not allowed to touch the workpiece with bare hands before squeegee to prevent the workpiece from being contaminated and causing defects such as bagging.
4. Adjust the amount of putty according to the size of the area to be scraped, and the ratio of main ash to curing agent is 100/(1.5~2.5).
5. The putty must be evenly blended and the consistency must be appropriate.
6. Do not scrape repeatedly to prevent curling.
7. In the application of multiple layers of putty, the pits should be partially filled first, then all scraped and finally thinned (also known as finishing).
8. In the case of multiple coats of putty, after the putty is cured, coat the next coat.
9. When multiple coats are applied to the film, each coat of putty should not exceed 0.5mm.
10. Once the prepared putty is found to have particles, hardening, and agglomeration, it indicates that the putty has begun to solidify and can no longer be used, and must be discarded and remixed.
11. The putty knives for mixing putty must be cleaned before taking the material from the main ash bucket, otherwise it is easy to contaminate the main ash and cause waste. To
12. After taking the material from the main ash bucket, the lid of the bucket should be covered in time to prevent the effective ingredients from volatilizing and affecting the performance of the putty layer.
13. When scraping on the primer, be sure to wait until the primer is fully cured before proceeding, otherwise the primer will be easy to bite. (Special attention should be paid to the passenger car industry)
14. The putty should be dried to a certain level before being baked at a high temperature, otherwise it is easy to cause the package and crack. Pay more attention especially in winter.
15. When the construction temperature is too low in winter, the putty will not be cured completely, resulting in poor adhesion, and it is easy to cause bagging and cracking during baking.
16. If the car body is placed outdoors in winter, the putty will be scratched when it is pulled into the room and it will be balanced with the room temperature, which will easily cause poor adhesion between the putty and the primer.
17. After the putty is water-milled, it must be fully air-dried, blow-dried or dried at low temperature before spraying, otherwise it is easy to cause bagging, cracking or other paint film defects.
18. If the putty pack needs to be repaired, the putty that has been peeled off from the substrate must be removed from the pack and its surroundings.
19. Styrene, an indispensable reactive monomer in putty, has a certain irritation. It should be constructed in a well-ventilated environment to avoid long-term inhalation of volatile gases, and be careful not to contact it directly. Individuals may have an allergic reaction, which can get better if you take a short rest or stay away from the allergen.
20. It is strictly forbidden to smoke at the construction site, and keep away from high temperature sources and fire sources.