I would use some stabilizer behind your VW applique. I am not sure where you would find it in the US but here I have an iron on paper that I buy from Echidna Products. It is intended as a stabilizer for machine embroidery but I have used it successfully for machine applique. Otherwise there is a paper product called stitch & tear used in heirloom stitching that could be used. Also I believe freezer paper would work. As a last resort you could use a non greasy lunch wrap which I have also used a long time ago. I hope this is helpful.