Best product to use on aggressive non-skid

Nickhoog

As the title states; answer???

plastered

Deck cleaner then non skid wax

Captjames

A soft bristle brush so it gets in all the cracks.  3M or starbrite non skid deck cleaner works pretty good.  I use Aquatech boat soap mostly and then a small squirt of it straight on areas with heavy staining.........