I want to use non slip paint for my workshop floor. Put off by the price of buying it I'm thinking it can only be sand and paint mixed. Has anyone done this?
Another option is to add something soluble and crystalline when the finish is beginning to gel. Once fully set you wash it away leaving a nice rough surface. Sugar works well on small boats and is easy to repair when it wears down.
In a busy bar we used to put silicon carbide grit into the varnish on toilet doors - you could tell by the skinned knuckles which clown had punched holes in them.