It is a fact that the webbing of the seat belt car gets the dirt because of constant touch and to eat and drink in the vehicle. However, buckles and plastic components can sustain heavy dirt marks that are challenging to remove as well.
Seat belt buckle is made of steel and has chromium plating. This makes them strong and durable. However, this does not mean that they will never get dirty. If you are looking for paracord chains then you can explore various online sources.
You must use specially crafted chrome cleaner to remove dirt from them. Follow the instructions for use carefully. The best way is to use a soft microfiber cloth to apply the cleaner. Rub gently and make sure buckle and you clean up the area even more challenging to achieve.
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Although buckles are generally resistant to corrosion, you should check them to rust just to be on the safe side. If there is, you need to use steel wool to remove it. Usually, there is no need to use a commercial solvent.
You can easily polish buckle with products designed specifically for the purpose. The best way is if you use a polishing tool, but simple lint-free cloth will do a good job as well.
Plastic Parts Cleaning
For this, you will need to use wet sandpaper. Preferably, it should have 2000 grit. You need to prepare a solution with a tablespoon of liquid soap and two cups of cold water and let it soak in overnight sandpaper.
After sanding is ready, you have to use it to remove impurities from the surface of the plastic components of the seat belt. You have to rub gently. You will see the dirt will go with soapy water. You must use a damp cloth to remove traces of residual soap and dirt after cleaning.