I have repainted sand surface floors several times — just use the pressure washer and repaint...not a big deal.

I BUY “PLAY SAND” from Home Depot to do this, and a 5 pound bag is only a couple of dollars (ask info desk for the aisle) — 1 cup of sand for each gallon of paint is what has been used for decades when doing floor surfaces around pools, patios etc. It doesn’t dissolve if not all used, you just have to re-stir well —…