Use Permanent Markers on almost all materials, e.g. plastic, wax, candles, glass, metal, paper, cardboard. Permanent Markers are quick drying and cannot be washed off. These markers are especially developed to use with JEJE Produkt peel-off stickers.
Colouring stains can be removed using alcohol. For mixing and shading / blending colours you can also use a cotton swab with alcohol.
This way you can create more shades and colours with these 7 markers.