Hi, Sharyn, I embroider with silk a lot and only use bees wax on couching thread. Some silks can be washed. Some bleed dye which is why they say dry clean. That said, I've gotten some silks wet for various reasons and they were fine, as long as they didn't bleed. If they bled, I kept rinsing with cold water till they stopped.
As for the scrubs, I got a sugar scrub for Christmas. It has oil in it and works really well. The sugar doesn't seem to dissolve in the oil. I usually use the exfolliant I use for my face on my hands, too. It does help. The more I've used silks the less problem I have with snagging, though. Anne