James, don't use the foam!!!!!!! I tried an experiment last week and what a disaster.... The foam needs to be in contact with the air to harden. Therefore, the outside of the foam hardened and the part against the car did not harden after 3 days...... I used plastic bags and duct tape and it was still a major mess. BTW make sure u use gloves with that stuff....it doesn't come off once it dries.