I think that increases the odds of the expunged record being detected, so I would not answer no on the basis of that expungement without having consulted with an aviation attorney and obtained a opinion letter. It does sound though like you can be issued a certificate after disclosing, it will just take a few months. You don't need a medical certificate until solo in any case.
Along with several other here, I would suggest consulting an aviation attorney. That will cost you a bit of money up front, but then you will have a much better understanding of the options. You can probably get a verbal consult in a few days and an opinion letter within a few weeks.
