Hiya! Just wondering what paint do they use with Natrosol gunge to gunge all these glamorous woman with? If somebody can link me up with a supplier here in the UK that would be fabulous. Thanks

MessySupplies and Mucky Pup seem to be the go-to for UK suppliers.

The paint is usually a tempora paint, a.k.a. children's poster paint. Its non toxic and washable making it much less likely to stain compared with food colouring.
Avoid hardware store paints since this is much more likely to stain and may contain toxic pigments.

We use children's powder paint to mix with the gunge powder. If you are after some powder paint we do have large quantities available of various colours.