A method of forming a coated bag for pre-treating an item stored in the bag, the method comprising the steps of: providing a bag (10; 30) having a sidewall (13; 33) extending from a closed bottom end to an open top end and defining an interior surface of a cavity; and expanding the bag (10; 30) from a flattened condition to an expanded condition; characterized by the further steps of: inserting at least one adhesive dispenser through the open top end of the bag into the cavity; applying an adhesive from the at least one inserted adhesive dispenser to form an adhesive coating on the interior surface of the cavity, wherein the adhesive is a first adhesive and the adhesive coating is a first adhesive coating; inserting a particulate dispenser through the open top end of the bag (10; 30) into the cavity; discharging a particulate from the inserted particulate dispenser to embed the particulate in the adhesive coating; drying the adhesive coating to retain the embedded particulate on the interior surface of the sidewall; and applying a second adhesive from the at least one inserted adhesive dispenser to form a second adhesive coating on the embedded particulate, such that the embedded particulate is captured between the first and second adhesive coatings (38a, 38b). providing a bag (10; 30) having a sidewall (13; 33) extending from a closed bottom end to an open top end and defining an interior surface of a cavity; and expanding the bag (10; 30) from a flattened condition to an expanded condition; characterized by the further steps of: inserting at least one adhesive dispenser through the open top end of the bag into the cavity; applying an adhesive from the at least one inserted adhesive dispenser to form an adhesive coating on the interior surface of the cavity, wherein the adhesive is a first adhesive and the adhesive coating is a first adhesive coating; inserting a particulate dispenser through the open top end of the bag (10; 30) into the cavity; discharging a particulate from the inserted particulate dispenser to embed the particulate in the adhesive coating; drying the adhesive coating to retain the embedded particulate on the interior surface of the sidewall; and applying a second adhesive from the at least one inserted adhesive dispenser to form a second adhesive coating on the embedded particulate, such that the embedded particulate is captured between the first and second adhesive coatings (38a, 38b). inserting at least one adhesive dispenser through the open top end of the bag into the cavity; applying an adhesive from the at least one inserted adhesive dispenser to form an adhesive coating on the interior surface of the cavity, wherein the adhesive is a first adhesive and the adhesive coating is a first adhesive coating; inserting a particulate dispenser through the open top end of the bag (10; 30) into the cavity; discharging a particulate from the inserted particulate dispenser to embed the particulate in the adhesive coating; drying the adhesive coating to retain the embedded particulate on the interior surface of the sidewall; and applying a second adhesive from the at least one inserted adhesive dispenser to form a second adhesive coating on the embedded particulate, such that the embedded particulate is captured between the first and second adhesive coatings (38a, 38b).