Use a product supplied with a leather repair kit in this instance.
To repair weathered white vinyl.
Basically you want to gently melt the top layer of the vinyl which in turn will give it a glossy shine.
This cleaning mixture is used to wash the vinyl siding and eliminate dust dirt mildew mold.
You see this often in cars boats and and other furniture that have high wear action.
The solution is a liquid vinyl repair kit and keeping your vinyl conditioned to prevent further wear and tear.
Spread the filler apply heat with a hair dryer or as specified in the product instructions and repeat until the surface is flush.
Measure the surface with a tape measure.
Knowing this you can preserve valuable items by regularly treating them with commercial plastic conditioning products.
The steps to successful vinyl repair.
If the damage is severe hydrogen peroxide can reverse the damage but it should only be used on white or gray products.
Run the heat gun over the whole thing moving back and forth so you don t stay in one spot too long.
Lay the old vinyl out on the tarps.
Save the old vinyl to be used as patterns for the new seat covers.
If your vinyl is just looking weathered and faded a heat gun can bring it back to life.
Run the tap water until it is hot.
Any plastic that comes into contact with the sun will eventually crack and lose coloring.
Run a heat gun over a weathered piece of vinyl.