I'm glad you've decided to stop self harming. I used to use a scalpel, or an artists knife to cut myself, and was very careful not to go too deep... and even though I was "careful" I still have criss cross silvery webs across my arms that plainly show my history. Perhaps people don't notice it... but I bet some do. And at a previous church, there was this beautiful, lovely lady, who always wore long sleeves... I remember being horrified when I saw what she'd done to her poor arms. Please if only to make sure you can wear a sleeveless blouse, stick to your guns here. It might sound like a frivolous reason... but who cares? If I knew for a fact that I could never again wear a teeshirt I'd try to avoid anything that limited my future choices.

Also, here's a technique that I learned which is extremely useful. When you next feel like harming yourself, take your finger, and gradually drag the nail across the space between your upper lip, and your nose. It may sound weird, but if you do that and then, eyes closed, focus on the sensation your fingernail left, then you're affectively drawing your attention to a physical stimuli that doesn't cause you harm, but does, even slightly, hurt. That will at the very least put time between you and your impulse to self harm (let's say it takes three minutes before the tingling dies away) and even provide you with an alternative.

That's been my best trick... hope it works for you.