No, not really. They can and will claim that any evidence you present was created by God some 6,000 years ago. If you assume a creator (God in this case) that can create anything for any reson, their is no way to prove that the world was not created 6,000 years ago.
Fossils? God created them in rocks 6,000 years ago. Radioisotope dating? created that way. 20,000 year old archeological site? created that way.