The company who made this video were called Naturotica. I bought one of their videos in the 90s, which was great as it featured totally nude girls getting muddy, but again there was no face or hair coverage.
I think it was from Splosh 24. The cover featured Amanda (above left), where she's covered in clay from her 'Messy Missies' set. I thought this set was great, but shame they didn't get their faces or hair muddy.