When sewing on vinyl a regular pressure feet stick to the fabric causing a huge mess. I found a neat solution for this problem while looking through my favorite craft supply catalog, PTFE Strips by Kandi Corp. I brought these about a year ago from Home Sew Inc.
Just apply strip to bottom of pressure foot and remove any excess strip. Make sure your needle and thread can go through the hole in the foot with ease. Then sew as you would with a non-stick foot! Its that easy. I have used these strips on my blind hem foot to edge stitch on vinyl and also on my zipper foot when inserting zippers in vinyl.
I looked a saw that Home Sew no longer carries these strips, but I checked out Kandi Corps website and they are sell a PTFE 5"X 9" sheet for $4.00.