Clean your cranks using a degreaser or some alcohol, water and a clean cloth. Make sure the surface is dry before applying the film.
Outside temperature must be at least 20° for an optimal application. If you have a hair dryer you can heat it up for 30″ in order to better mould it later.
Start from the pedal axle to apply progressively to the opposite side and then from the bottom to the top so that all the surface perfectly get stuck.
Do not use or wash the bike for at least 24 hours in order to let the glue dry and disappear.
Download UNIVERSAL CRANKS PROTECTION INSTRUCTIONS: here