Just completed my latest street SUP She is 4 foot long and 8 1/2 wide and 18mm thick, recycled some hardwood I had laying about the shed. I've done a few now but this one is my favourite so far.
No Need for grip tape. It's the clsssic coat of polly and caster sugar. It's pretty sharp when it first dries so you can give it a rub and turn it down a bit with sand paper. It's what I also use on my timber SUP.