If you want the BEST one step process got to www.boatbling.net
and get HOT SAUCE. I have tried the rest and this is the best water spot remover/ wax I have used. Yes it cost more at about $16-18 a bottle with shipping. Let me guess you spent over $20K for your boat, spend some coin on keeping it looking good. Also the Vinyl Sauce is very good as well. I also like the 3M vinyl restorer if you have older vinyl that needs to be cleaned up and taken care of. As for wax and polish I really like the driven product line. www.driventoperfection.com
it does a great job.