M_Boats: how do I tell if Cetol was used on teak?

Hi guys I am working on a boat that has quite a bit of teak. I just got it and do not know what the previous owner used. He sent all his supplies and they included Cetol and varnish. I want to go with just varnish as this is a traditional boat and varnish is my preference. I have used Cetol and I know if works well. My question is if Cetol was used how to I tell? And if it was used I am inclined to strip it with a heat gun and start from bare wood. Any suggestions would be appreciated. Thanks! Robbin Marshall 22 Otter, M-23 Pinch Me robbin.roddewig@verizon.net