Rick, my wife and I had been boaters for 25 years prior to getting back into motorhomes. She will attest that every cleaner and polish had been used on our boats in that period of time. Since purchasing our 05 34' Alpine I have come across a product called Protect All Shine Plus. Even my wife agrees that it is absolutely phenomenal. We have Zodiaq counter tops in our home and like the rest of us have Karadon in our Alpine's and it puts a beautiful pleasant shine to both of them as well as many other things.(www.protectall.com
)If this won't put a shine back into it then I believe the refinishing process is in order. I think that I would want to try a mild polishing compound prior to getting into sanding the tops. Just my opinion.