Bandages are just another name for gauze pads and sterile dressings. You can buy them from your pharmacy, in both sterile and non-sterile forms, as well as in different sizes and types of materials. They are also available from vet supply companies. The type of bandage you have dictates the type of use. Ideally, you d use sterile bandages where the area needs to be kept as clean as possible.
Styptic powder is an effective coagulant for minor wounds.
That is, it stops bleeding from things like small scratches, a nail trimmed too short, etc. A major brand is Kwik-Stop, which you can get at a pet store or from a vet supply company. Any brand is fine, and there are different forms. You can get it in a plastic cup with a flip top, a pencil , pre-dusted pads, etc. The idea is to get a liberal amount of the powder onto what is bleeding.