Use a product supplied with a leather repair kit in this instance.
To repair weathered white vinyl.
Run a heat gun over a weathered piece of vinyl.
Write the measurements down and add 6 to 7 inches which you will need when installing the new fabric.
Measure the surface with a tape measure.
Basically you want to gently melt the top layer of the vinyl which in turn will give it a glossy shine.
Lay the old vinyl out on the tarps.
Mix vinegar and water in a large bucket in a 30 to 70 ratio 30 percent vinegar and 70 percent water.
You see this often in cars boats and and other furniture that have high wear action.
Any plastic that comes into contact with the sun will eventually crack and lose coloring.
This cleaning mixture is used to wash the vinyl siding and eliminate dust dirt mildew mold.
When this topcoat wears away or is damaged the vinyl can crack.
Knowing this you can preserve valuable items by regularly treating them with commercial plastic conditioning products.
Spread the filler apply heat with a hair dryer or as specified in the product instructions and repeat until the surface is flush.
Run the heat gun over the whole thing moving back and forth so you don t stay in one spot too long.
If the damage is severe hydrogen peroxide can reverse the damage but it should only be used on white or gray products.
The steps to successful vinyl repair.
Save the old vinyl to be used as patterns for the new seat covers.