Here is a link of a FMQ video where the gal recommends the 505 spray and answers a lot of questions about it (there are 4 videos in all and I did view all of them.) You might want to take a look. She did mention spraying the quilting table (hers is acrylic) with a spray to help the quilt slide around easier. Hope this helps and answers some questions for you! Good luck! :)
http://www.youtube.com/watch?v=39I5A3iyCtw