There are a few reasons why you would need to use something on plastic bumpers before painting them.
* To remove any dirt, grease, or wax that may be on the bumpers. This is important because any contaminants will prevent the paint from adhering properly to the plastic.
* To create a smooth, even surface for the paint to adhere to. This can be done by sanding the bumpers with a fine-grit sandpaper.
* To apply a primer to the bumpers. This will help the paint to bond better to the plastic.
Once you have completed these steps, you can then paint the bumpers with the desired color of paint. Be sure to use a paint that is specifically designed for use on plastic bumpers, as this type of paint will be more durable and less likely to chip or peel.
Here are some specific products that you can use on plastic bumpers before painting them:
* A degreaser: This will remove any dirt, grease, or wax from the bumpers.
* A fine-grit sandpaper: This will smooth out any rough spots or imperfections in the plastic.
* A primer for plastic: This will help the paint to bond better to the plastic.
* A paint for plastic bumpers: This type of paint is designed to be durable and less likely to chip or peel.
