I've got a new bottle of MM "Army/Marine Gulf Armor Sand"; but I'm not going back and repainting the whole thing now.
Don't use that paint either. It is based on a non-CARC color that was bought locally in Saudi Arabia to quickly repaint vehicles as they arrived in theater for ODS. It was only used then and it was not used after ODS. The best color for modern CARC Middlestone (modern sand) is still Testors Model Master Sand (FS 33531).