Why are you not so sure about the wax?

No fan of simple physics?

Go get Frank Bethwaite's book, High Performance Sailing. In it he lays out exactly what a dirty hull will cost you in speed, and it's a lot more than 1/10th of a knot.

http://www.amazon.com/High-Performa...mp;s=books&qid=1304511678&sr=1-1

Read some of the reviews...if you race sailboats but don't own this book, well, it would be money well spent.