I have a 1980 Hunter 33. The head vanity top is in dire need of refinishing. However, I can't really determine what the top is made of. It seems some sort of an early "Corian" possibly. It don't know what to use to refinish this, fine sand paper on a randon orbit sander or a buffing wheel on a drill with fine abrasive. Could someone please tell me what this material is. Hunter Marine Tech support was less than helpful, which I have found to be their usual, Thanks alot, I look forward to hearing from you!