Or sprinkle DRY sand on the penultimate coat when almost dry. Sweep the excess sand off when the paint is dry and then put on a top coat. More foot friendly that way.
Silver sand is better (finer) than builders or beach sand.
Use a fine sieve for the sand/salt/sugar to get an even coat. You do not want a complete covering. It is worth practicing on a sheet of newspaper or something to get the technique before applying to wet paint.
You can pre-mix the sand with the paint, but if you do keep stiring, otherwise it sinks to the bottom of the tin.
"A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools" Douglas Adams