In a large pan place in lint and water, stir to dampen all parts of the lint. Add flour and stir well, take care to prevent lumps. Add the oil of Wintergreen and stir well. Cook over low heat, stirring constantly, until mixture holds together and forms peaks.
Pour out onto several thicknesses of old newspaper to cool. This makes about 4 cups. You can store this in an airtight container; it will keep for several days. You can use this to shape over boxes, balloons, or press into molds. This does take 3 to 5 days to dry.