Part of the study was on madforsailing.com or the Daily Sail with a link to the university library for the complete article. I read when it was a free website and did not think to copy it. Maybe someone with a subscription to The Daily Sail could find it for you.

I was told that someone found the article by going into the Online University Library search system. I can't confirm that.

There are actually lots of articles available on this subject however most are hard to for the majority of people to read. For example.

The Relationship Between Frictional Resistance
and Roughness for Surfaces Smoothed by Sanding
Researcher: Assistant Professor Michael P. Schultz
An experimental investigation has been carried out in the 380-foot towing tank at the U.S. Naval Academy Hydromechanics
Lab to document and relate the frictional resistance and roughness texture of painted surfaces smoothed by sanding.
Hydrodynamic tests were carried out in a towing tank using a flat plate test fixture towed at a Reynolds number (ReL) range of
2.8´106 – 5.5´106 based on the plate length and freestream velocity. Results indicate an increase in frictional resistance coefficient
(CF) of up to 7.3% for an unsanded, as-sprayed paint surface compared to a sanded, polished surface. Significant increases
in CF were also noted on surfaces sanded with sandpaper as fine as 600-grit as compared to the polished surface. The results
show that, for the present surfaces, the centerline average height (Ra) is sufficient to explain a large majority of the variance in the
roughness function ( ∆U) in this Reynolds number range. The results of this study have been published in the Journal of
Fluids Engineering


If you have access to an online search and retrival like a University Library. You will find many articles on the subject.