Wool polishing disc or sponge polishing disc?
The main difference between wool polishing discs and sponge polishing discs in car beauty: sheep discs are usually traditional cutting materials, with strong grinding ability and obvious effect, and will leave swirls after grinding; generally used for grinding and polishing of ordinary paint, transparent paint Not suitable; the cutting force of the sponge disc is weaker than that of the wool polishing disc, and it will not leave swirls. It can effectively remove the defects of the moderate paint surface. It is generally used for grinding and polishing of ordinary paint and clear paint, and polishing after the wool polishing disc. , for waxing; one is for pre-repair of cutting or crashing vehicles.
Complex, one is used for ordinary paint repair of the body. At the same time, general wool polishing discs are divided into two types: white and yellow. There is an automatic paste at the bottom of the polishing disc, which can realize the quick conversion of the polishing disc.
The sponge disc is not as strong as the wool disc, but it is safe to use and suitable for beginners; The paint surface is more likely to produce thermal effects. When using the hair wheel, it should be noted that the angle of the disk surface should be 15 degrees in order to discharge dust and dissipate heat.
polishing step
After the car surface is sprayed, there may be small defects on the surface of the paint film such as coarse grains, sandpaper marks, flow marks, reverse white, orange peel, etc. In order to make up for these defects, the car is usually ground and polished after spraying to improve the paint film. The mirror effect can meet the requirements of bright, smooth and gorgeous. The steps of grinding and polishing are as follows:
1. Clean the vehicle. Use a paint cleaning agent with strong detergency to clean the whole vehicle. When using a cleaning agent, avoid new scratches caused by particle dust during grinding.
2.Sanding with water sandpaper. For defects such as coarse grains, fine sandpaper marks, and flow marks on the coated surface, use 600#~1000# water sandpaper to wrap the small rubber lining block with water before polishing, and gently polish it until it is smooth (be careful not to wear it through). paint layer)
3. Coarse and fine grinding. Use a machine grinder (electric or pneumatic) plus coarse grinding paste to roughen the traces of water sandpaper; add grinding paste for polishing and fine grinding.
4. Polishing. Use a mechanical polishing machine and add a mirror treatment agent to remove the spin marks left by the rough grinding paste to achieve the effect of mirror polishing of the paint film.
5. Manual glazing. After grinding and polishing, wipe off the grinding and polishing paste, immediately wipe all the polished parts with cotton yarn dipped in varnish wax, and then use dry cotton yarn to wipe off the excess glazing wax, so that the paint surface is bright and dazzling like a mirror.
