Getting the Sand Out Without Ruining Your Paint

Spend 10 minutes just on the underside. Use an angled wand to flush inside chassis rails where salt and wet sand love to sit and cause rust.

Rinse the whole body with water first, then hit it with a heavy layer of snow foam. Let it dwell for 5 minutes (don't let it dry!).

Blast the foam off, working from the top down. This should take 90% of the abrasive sand off without you even touching the car yet.

Now you can use the mitt. Wash a panel, rinse the mitt in the 'rinse' bucket, then reload with soap. Gentle pressure only, mates.

Use your soft brush around window rubbers, fuel caps, and door handles. Sand hides here and drops out later to ruin your drying towel.

Use compressed air or a leaf blower (the missus might look at you funny, but it works) to blast sand out from under seats.

Vacuum in one direction, then the other. If the sand is stubborn, use a massage gun on the carpet to vibrate it to the surface.