Measure three cups of soybean oil, and pour it into clean, dry bucket.
Add 1½ cups of turpentine to the bucket, and stir the mixture thoroughly with a clean wooden paint stick.
Place your canvas awning on a clean work surface. Apply a layer of the turpentine and soybean oil mixture to the surface of the awning using a paint roller or brush. Allow it to dry overnight before handling.
Turn the awning over and apply the turpentine and soybean oil mixture to the underside for additional waterproofing protection.