A Guide to Problem Solving - The Application of Interior Wood Coatings Home/Group/English/PRODUCTS/Problem Solving Guide Flotation Separation of the pigment in the coating during drying, resulting in non-uniform colour. Cause Preventative Action Coating is past it's shelf life. Use fresh coating products at all times. Ensure good stock rotation of coating products, using the old stock before new stock.  Applied coating is too thick. Apply all Mirotone coatings to the correct Wet Film Thickness as specified on the relevant product data sheet. Coating viscosity is too high or too low. Apply all Mirotone coatings at the correct viscosity as per the instructions on the relevant product data sheet. Back to Problem Solving Guide Disclaimer: The recommendations above are based on data from Mirotone’s own research and information from others whose work we believe to be reliable. Due to possible differences in actual application methods and conditions, users must satisfy themselves that the end result meets their requirements.