As a former first-aider I'd like to point out that dressing wounds isn't the only thing they do. There are other things that bandages do, such as support a damaged limb. And, as I imagine Ray may point out, it's not a first-aider's job to dress the wounds so that they will cure themselves. First-aiders don't set bones - for example - they just immobilize the wound. A first-aider's job is to stop any further deterioration in the casualty's condition, before a doctor can attend. (In some cases, a first-aider may - justifiably - do harm: for example, one of my trainers once used a blanket pin to secure an unconscious casualty's tongue - when they were trapped in a face-up position. The doctor would have to treat the damage to the tongue, but at least the casualty wouldn't choke before the doctor arrived.
So my proposed new text would be something like 'Firstly, we should use the first aid kit to deal with the superficial wounds'. [Incidentally, this is wrong - though not on grounds of grammar. 'Firstly we should clear the airway and ensure there is no possibility of renewed blockage.' ('Superficial wounds' don't concern a first-aider much.)]
b