The idiots go flat out along the waters edge,forcing salt water,wet sand up into seams ,chassis rails etc.Our company used to rustproof many 4x4s.I used to tell them after 3 times on the beach without protection salt becomes a real problem.Cad plating discolors bolts rust,,alloys oxide,easy to pick a beach driven vehicle.I remember once a new Pajero owner came in for treatment ,del klms only.Put my fingers in the chassis rails,full of sand!Showed the owner,he went ballistic took it straight back to the Mitsibushi dealer in Redcliffe. Turned out had been a promo vehicle at Frasier Island fishing comp,plus the speedo wound back! Suffice to say the owner got a new vehicle plus huge amount of free bits to shut up.However the dealership got done a few times for dodgy deals.This happened around 20 years ago.