Scarring

Has anyone else had experiences with scarring from their psoriasis? Can anyone recommend anything to stop/recover/cover scars? I scratch subconsciously (especially when I'm stressed and in the night) and in the past this has left me with deep cuts/grazes on my hands. These often take a long time to heal properly and are left with horrible scars. They also look awful whilst they heal, as I have been advised not to cover them, but "let them breath". They are often infected despite frequently using anit-septic spray and alcohol wipes. The scars if I'm lucky are pale and textured like a scar from a burn, however from particularly bad/deep areas they can be red and very incongruous - I'm particularly concious of one on my wrist. I've had it for over a year and I often try to cover with itchy jewellery!