Artefill is essentially a permanent implantation of microscopic spheres that are integrated into your own skin tissue. Because they are dispersed, there is no way that I know of that would allow you to remove only the beads themselves.
I'm certainly sorry to hear you have an overcorrection. This could potentially have been avoided with a more gradual correction done over two or three visits.
Because the body's response is unique to each individual, some of the "over correction" could be partly your body's collagen response to an injected material. This is yet another reason anything permanent should be used very carefully and in my practice I'll only consider Artefill for patients who have had satisfaction with temporary fillers and we both know what to expect.
Artefill is not recommended for use in the lips. Tissue structure is different in different parts of the body and will accept and respond to different materials in certain ways. Thus we have a variety of fillers that are chosen for a particular area or purpose.
Only a plastic surgeon will be able to give you the most knowledgeable response to your problem. Seek an experienced board certified surgeon who has expertise in revisional surgery so any scar you "trade for" is the most minimal.