RE: Surface Drag
Given the work required and the size of tunnel needed to confirm what you are trying to measure, probably not. That said, if you care to go back through your 1940's~50's 'Aeromodellers' and 'Flying models' and 'MAN's you will probably find much 'theoretical' analysis of model wings, turbulators and surface turbulation relating to Reynolds numbers typical of what you seek. Much of this stuff is grounded in thin air, but the problems, and solutions, of the airfoils used and speeds where the problems manifest, is well covered. It does make interesting reading, if nothing else.
Evan, WB #12.