Used Like New Vax SpotWash 1 Litre Solution | For Rugs, Upholstery and Carpets - £7.72 at checkout @amazon warehouse

If it's a wet vac, then yes. This product is concentrated, so you mix it with warm water to create a soapy lubricant that loosens all stains and dirt from fabrics, carpets, etc. Anything that can suck it up wet should work.
I used a drill brush extension to agitate after spraying, and it brought out all the stains, it also leaves a nice fresh smell. You should be able to use this like any other carpet or upholstery shampoo or cleaner. (edited)

Mine arrived with the cap still sealed