Over time, the outer surface of plastic headlights begins to give off yellowness, scratches and dullness appear on it.
This problem is solved by grinding and polishing. This is a long and difficult process. It can be lightened and accelerated many times over by using a special commercially available chemical polishing kit. When used correctly, remanufactured headlights will look like new.
What you need:
- chemical polishing set - http://ali.pub/57a2w1
Chemical polishing process
The headlamp to be recovered must be removed. If the work is carried out without dismantling, then you should protect all surfaces around, especially the hood, by pasting them with masking tape. The polishing itself should be carried out indoors, since dust is very undesirable for this process.
First of all, the headlight is sanded with sandpaper by hand or with a machine. It is necessary to remove the upper protective layer from ultraviolet radiation, and get to the plexiglass. You can start with P400 or P600 abrasives, and gradually move to a finer sandpaper.
The headlamp is brushed and matte. You can check if the deep scratch is gone by pouring water on the surface. All defects are clearly visible on wet glass.
The final sanding is done with water by hand with a bar and fine sandpaper. The movements are reciprocating, but not circular. It is necessary to remove the risks from previous resurfacing.
The headlamp is then washed, dried and degreased.
A heated cup from the kit is filled with 20-30 ml of polishing liquid.
A guide nose is put on it using an O-ring.
The power supply is connected to the cup, and it is connected to the network.
After a couple of minutes, her nose is brought up to the glass. The escaping vapors instantly dissolve the surface of the plexiglass, and it floats.
All remaining marks and dullness are leveled, and the headlight becomes transparent in the treated area.
Fumigation with chemical solvent vapors is performed in succession. If there are risks somewhere, then you can go back and hold the nose a little longer until the surface is smoothed out.
In the future, in the absence of deep scratches, it will be possible to restore by chemical polishing simply after degreasing without grinding. The method is very convenient and fast, and most importantly, it does not require expensive equipment.