It doesn’t seem to working as described

8. I cleaned and polished my boat using conventional cleaners but stains remained, I have now applied Grunt! boat cleaner but it doesn’t seem to working as described, am I doing something wrong?.

If you have just applied a wax polish to your boat you will effectively have sealed the surface, this will hinder the performance of Grunt! boat cleaner as it can not reach the stain to remove it as the wax is acting as a barrier.

Wash the boat down with any good quality boat wash product such as “Boat Buddy All Over Boat Wash” to remove the wax polish applied and then use Grunt! as directed. This will ensure Grunt! boat cleaner can get into the pores of the gelcoat and gently neutralise and absorb  the stains enabling them to be easily washed away with water and a sponge.