Surface piercings are incredibly difficult to heal. I have a friend who had clavicle piercings for almost a year, and they never completely healed. It wasn't worth the trouble to try to keep them, so she took them out. The scar tissue she's left with is just now beginning to fade, a couple years after removing them. Aside from refusing to heal, there's also the possibility that they will reject and turn into a nasty infection. I really wouldn't recommend trying that on your own unless you have an extended knowledge about piercings, and have experience actually piercing. Sterility is a bigger issue when it comes to self-piercing as well.
I know a couple other people who have clavicle dermal anchors, and they have the same LOOK as surface clavicles, especially if you get two on each side. But the upside is that they're much easier to heal and take care of, if you're mindful of them at all times and don't have complications [say you snag one on something, etc]. More permanent, if that's what you're looking for. If you don't mind getting a piercing, only to have to take it out in a couple months time, by all means go for the surface piercings.
Its one thing to pierce your own ear or lip even though its not recommended, but collarbone piercings are really too advanced for the average person to pierce.
Surface piercings are always more likely to reject and collarbone piercings are subject to a lot of movement whenever you move your neck, which makes rejection even more likely. You need to be able to place it on the right area for your body so it has the least chance of rejection.
Rejection is a problem with all surface piercings, but self piercing comes with a whole other set of problems. Physically piercing it will be nearly impossible to do by yourself. Its not like you can just shove the needle through. You have to insert the needle into your skin, move it under the skin and then stick it back out at the right place. If you make the entrance and exit points too close or too far apart, the surface barbell you have won't fit in right. You also need to make sure you pierce it deep enough into the skin so that the posts on the barbell don't stick out of the top too much, but not so deep that they don't stick out at all. Plus, if you want the piercing on both sides, that means that you will have to do the same thing over again with your non dominant hand, as if it wouldn't be hard enough already.
On top of all that, there is the usual risk of infection that comes with self piercing. There's no way you can set up as sterile of an environment as a reputable piercer.
I hope you actually take this into consideration and don't pierce your own collarbone. You will probably just screw it up. If you really want this piercing, save up the money and get it done right from a reputable piercer.
i have never seen this piercing. do you mean to actually penetrate the clavicle, "collarbone" or just the skin? well the clavicle is attached to several muscles such as the sternocleidomastoid, pectoralis major, deltoid and others. before the clavicle there's also the subclevious artery after it becomes the axilary artery. about midway thru the clavicle you also have the brachial plexus which is a very important number of nerves that control muscles like your pectoralis major and minor and also control movements and feeling along your arm, forearm, and hand. these things aren't very superficial but you should know that they are there. I would highly recommend you don't try this or anyother piercing yourself. though most professional "piercerers" might not have a knowledge of detailed gross anatomy they know where to pierce and where not to pierce. they also have sterile equimpent that prevents infection.. or so I hope