After playing in a big sand pit at the weekend i have sprayed my brakes twice with water and tried to fluch any crap from the calipers. however i am getting a constant scraping moise when driving and worse when braking.

I guess the only way to sort it is to take the calipers off and clean them out, can i fust use WD40 and a brush? Im expecting grains of sand stuck to the brake pads and i hope i can get them out / off !!

Any words of wisdome ??