We found that there was an actual film made in Korea based on this urban myth. This film closely followed the myth itself, with a woman taking a bath in a tub filled with seeds. The seeds in this film aren’t sesame seeds as they are much bigger, which gave us some ides.
In the film it appears as though they have used latex that has been thickened and is skin coloured. This type of latex is harder to purchase than liquid latex as it contains an expensive thickener. It appears that for our film it would be easier to use liquid latex as it dries quickly and provides a thin layer for the small seeds that we plan to use.