I recommend that you consult a local bankruptcy attorney on this, but I have seen this done before. Even though the case is closed, you can file a motion to reopen and see judgment liens. A local attorney will be able to examine the facts of your file to determine if actually qualify for removal of the liens.
First, the firm is a debt relief agency according to the U.S. Bankruptcy Code. We help people file for bankruptcy. We also do other stuff and we do it well, but Congress wants me to post this notice. Second, nothing on this site is legal advice. You are not my client unless you enter into a written agreement signed by you and me.
You quite possibly can, but it will not be a piece of cake. Reopening the case shouldn't be that hard, but you're going to have to establish the value of the property at the time of the filing, which was some time ago. That can be done, but it puts another wrinkle in this. Depending upon the amount, you might be better off settling with them for pennies on the dollar, but even then the attorney will probably be able to do better than you could on your own, so you really want to consult with a bankruptcy attorney on this one.
Todd Mannis, Esq.
It is a pretty simple thing to reopen a bankruptcy to remove the judgment liens if you know what you are doing, but the process isn't cheap. Your plan makes no real economic sense based on the information you provided and I have to wonder why you want to pour good money after bad right now. Hope this perspective helps!