I can speak from experience that the Sullivan spray does NOT wash out easily. It stained the white fabric - turned it yellow, so I washed the fabric, the stain did not come out and it was still very sticky. If I get it on my table it usually takes Goo Gone to remove it totally. I wrote to the company for assistance twice about it staining the fabric and got no response other than someone would get back to me within 24 hours. No one ever did respond. So I have bought my last can of Sullivan.
There has been no trouble with overspray on my carpet with any of the basting sprays I have used over the years - but I have learned to wear the mask while spraying. I use the masks that people wear while moving lawns, they come 3 or 4 to a pack.